@@shaneeya_7382 there are rumours.. SKZ are gonna cover Thriller while BTOB will cover Back Door (SKZ song) on Kingdom...but these are just rumours nothing's confirmed...
this was guud tho. curious how skz going to remix this song to not sound too shadowing the original. oh ya pls stay, dont reply me "im sure they gonna do great on it bla bla" cuz that quite irritating sometimes 😂. since i said im curious. not asking for assurance.
@@bhagirathbhatt5990 they are 3rd Generation. They debuted at the same time as exo . And we really aren't obsessed with views in this fandom as btob always says "don't be obsessed with chart and views. we are btob who want to touch your heart instead of selling CDs "💙
Seeing Sungjae's looks at the start of the video made me think that he would be perfect for a vampire/immortal role. Not the Count Dracula type, but the Edward Cullen or Damon Salvatore kind of vampire. Handsome, sexy, mysterious.
Yeah. I fell in love the first time i listen to this song. And thats rare. I usually like a song after listening to it a few times. And don't forget the MV. Totally awesome
I.M Melody he just doesnt care about look..😂😂😂 this kind of man exists in this world😂😂😂.. hey check his duet in duet song festival. he sang beautiful by crush beautifully.. you re gonna love it..
Waw...Hyunsik and Sungjae *really* fit this thrilling,mysterious, dark style. They really stood out to me in this MV a lot. And it's ironic because their both my bias, and I'm not saying this to be bias, they just really brought out the thrill feeling.
isn’t this song a masterpiece? the arrangement, the drums, the string instruments, the piano. they’re so perfect. anyway, im shocked at how old this song is. my childhood 😭
Our second time meeting melodys hahaha first spoiler was skz covering I'll be your man and now this ^^ as long as skz gets to cover btob then I'm all good! I'm a 2nd gen fan btw, I miss this era sm
Oh i‘m a stay and doing the same rn loll and i have to say I love this song very much and am really excited to see skz and btob cover each other if the rumors are true. Also I‘ve come to realization that i really love btobs music 😌
I feel like not enough people talk about or appreciate Peniel. I understand that he had little to no lines but he's so cute and adorable yet I couldn't find any comments about him. He's so under-appreciated and it's just ugh!
but melodies loves him so much..a shy but cute adorable peniel shin, actually, he improved a lot since debut and sings/raps line more now...as well he contributed also in composing and rap making.
+Hannah Banana I know right. Like HE US CUTE OMG!!! But so far....I barely have heard ANYTHING from him. I came here from his times at ASC, Illhoons collab with Hyuna, and School 2015. Peniel is like my bias yo (even though Sunjae is ma bias wrecker) I feel like I can connect with.
Nina_Armstrong Hidashi He has such a great personality too people need to appreciate him more becuase honestly he is the most adorable person ever! ps (he's my bias too)
Im here because the rumor that skz do the switch song with BTOB sunbaenim in Kingdom and they will perform this song meanwhile BTOB sunbaenim perform BackDoor This was a good song sunbaenim, BTOB never make dissapointed. I can imagine how changbin will do the rap, han will do the high note, chan do the reff, and other member too.
About a year back someone commented on some EXO mv channel that BToB vocal can be compared to EXO vocal. I became curious and started listening to this group's songs. 1 year later I am a regular listener of BToB songs.
Hey can they please let all the rumors true... Like i don't want to have false hope again. But either way if Stray Kids will cover this, I won't say much bc i know they can give justice to this song.It's also been a long time Thriller was asleep. Fighting to everyone!!!
I like BtoB songs especially Missing U. I really look forward to the collaboration of SKZ-BtoB, I hope BTOB will be more successful and known to many people. they have good vocal, ahh and i'm missing Sungjae😭
I fell for btob after watching kingdom.. can't wait for my ults to cover btob and vice versa.. If the rumours are true I can't wait for the backdoor cover
Nell H ikr :"> He killed everything when he was a prince and changed to a vampire here then he kill me when he's a madman in You're so fly lol xD I can't stop laughing and I wonder how can a cool guy become a very-crazy-guy-but-still-cute like that =)))
Nell H hahaha I think maybe he's just crazy whenever he wants lol xD sometimes he tries to make brand-new-image-idol and acts cool but we all know how crazy he is =]]]]] So I'm waiting in impatient about BTOB comeback now... R'n'B Ballad lol Is Changsub still going Insane like that? =)))
Huynh Vy Haha Yeah we all know his real personnality, he can't hide it :3 Yesss I'm so impatient too to see them with a new concept in which I hope ChangSub will be able to kill us again :'D
After Skz Introduction Stage i came here, the green lasers reminds me of this MV, and there's a spoiler that Skz will perform this song... I can't wait anymore
I knew kpop since more than 10 years and I am ashamed of myself for not knowing about this masterpiece until now.. I came here after hearing that skz might cover this song! this is lit!!
I think is the second time we think BTOB and SKZ will exchange songs haha wowW it's a shock watching them like this instead of calmer sings but it's really good !! Eunkwang with pink hair wowW I can see SKZ covering this, maybe that's why Seungmin is singing so hard lately mmm
@@ritzelgeoleondry5149 try watching them in variety shows and contests. It gets funnier and funnier on the variety shows but you'll be amazed how serious and amazing they would be on professional stage. You'll love them more
hi im a stay and i heard skz and btob are gonna cover each other's songs! 🤩 i remember that i was obsessed with this song when i was 11 years old 😄😁 haha i will be veryyyyyy happy if the rumours turns out to be true~ if its not true, i will still support btob bc i like them!! btob & melodys fighting~~ ❣️❣️
Rumors says that Stray Kids might cover this and BtoB will perform SKZ's Back Door (based on pictures of their clothes). I hope it's true. 🥰 This song is so good.
I miss the era when the comebacks we are about full impact and powerful songs.. This concept of BtoB and also majority of BAP’s.. One Shot and Warrior..
I'm a STAY but I'm really glad more people are checking out BTOB's songs since they're one of the few groups that got me into k-pop (along with GOT7 and Day6) back in 2016. Sooo excited for them to perform their own version of Back Door!
Came here again bcz rumor stray kids have to cover this awesome song. Can't wait. Also can't wait btob if true cover stray kids back door. #Melodybtobfighting #Melody
I listened to thriller around 7 years back when I was a newbie in k-pop. Loved it back then. Listening to it now after 7 years. Never knew it was from btob. Have been obsessed with btob's songs lately. One of the most talented groups in the industry 😍😍😍
BTOB music kinda weird, we listen in 2022 and somehow it's still suit trend now day, if it's being song for famous 4th gen boygroup, it's will really be famous internationally
If Thriller release these day, the whole kpop world will be shaking
i was also thinking the same
Yess 🔥 hope btob would do a concept like this again 🔥
i hope they perform this at kingdom :')
@@potatoo2121 back door???
@@shaneeya_7382 there are rumours.. SKZ are gonna cover Thriller while BTOB will cover Back Door (SKZ song) on Kingdom...but these are just rumours nothing's confirmed...
Thank u STAY for checking this out.
Happy to!
I didn't heard any rumors, just found out in the comments but I LOVE this song and I can't believe I haven't heard it before :'/
omg of course i love this song can't believe i havent heard it before either.
this was guud tho. curious how skz going to remix this song to not sound too shadowing the original. oh ya pls stay, dont reply me "im sure they gonna do great on it bla bla" cuz that quite irritating sometimes 😂. since i said im curious. not asking for assurance.
@@bedahnim6188agre3
I'm a Melody since 2013 and I'm a Stay since debut.. if Stray Kids cover this EPIC song I'll lose my wig!!!
SAME
I'm a melody since btob debut and I'm baby stay (4 months)
you'll lose your wig HAHAHAHA
ooops 🙉
I ALREADY LOSE IT ㅠㅠ
2024년에도 보는 사람손?ㅋㅋㅋㅋ✋🏻✋🏻✋🏻✋🏻
Me!!! :3
손❤
손
손
저요오😊😊
Miss old kpop era when every kpopers didn't care about the views and they just enjoyed the song and MV
Really super very highly agreed.
I also agree.I want to know that Are they from 2nd generation of kpop?
@@bhagirathbhatt5990 they are 3rd Generation. They debuted at the same time as exo . And we really aren't obsessed with views in this fandom as btob always says "don't be obsessed with chart and views. we are btob who want to touch your heart instead of selling CDs "💙
TRUEEE
Waiting till 2020.....😭 miss them sssooooo much
ㅋㅋㅋㅋㅋ아 얘들아ㅜㅜㅠㅋㅋㅋㅋㅋㅋ스릴라 진심 내 최애곡...
The crime here is Thriller only getting 10M views, this song was a bop and still is and deserved way more attention
Btob is one the best yet underrated :((
btob is truly the best!!!
Especially with these visuals?!?!
It was released when nobody cared about views..
Hajar EL HOUSSNI doesn’t change the fact that it deserved more views 🥴
2023년에도 스릴러 들으시는 멜로디 어서와서 들으러와주세요 심장을 강심장으로 어서 키우십시요
Seeing Sungjae's looks at the start of the video made me think that he would be perfect for a vampire/immortal role. Not the Count Dracula type, but the Edward Cullen or Damon Salvatore kind of vampire. Handsome, sexy, mysterious.
비투비 노래들은 파면팔수록 미쳤다... 요즘 노래도 좋지만 비밀, 그입술을뺏었어, 스릴러 등에서 흘러넘치는 광기와 폭발력 멋짐
Ilhoon's look in this is so iconic wow a true visual king
SKZ WILL COVER THIS SONG IN 2ND ROUND OF KINGDOM 😭😭😭 I'M SO EXCITED
Sungjae and Ilhoon look so hot in this MV wow!
agree TT
maya agree
Ilhoon and sungjae is still in their high school when they sing this....
People who knows and listening to this song is a legend since this song is a LEGEND itself! I feel pity for those who doesn't know this song...
Yeah. I fell in love the first time i listen to this song. And thats rare. I usually like a song after listening to it a few times. And don't forget the MV. Totally awesome
진심 요즘 스릴러로 달리고 있음.. 노래 개 신나고 중독성 개미쳐버림... 모든 명곡은 비투비의 것인가?ㅠ💙💙
i dont think Chungsub realizes how GOOD he looks
I.M Melody he just doesnt care about look..😂😂😂 this kind of man exists in this world😂😂😂.. hey check his duet in duet song festival. he sang beautiful by crush beautifully.. you re gonna love it..
I.M Melody ...he will always be the cutest changsubie...
HE LOOKS SO HAWWWTTT GODDAMN
Changsub is really handsome when he performs or acts in mv
Then i watched BTOB off-stage videos compilation and there is Changsub lol
Sungjae's visual in this era tho. Just watch his fancams !!
Sungjea is my favourite
but Sungjae's visual is always great,,not just in that era..lol (of course Minhyuk's visual too)
oke im sorry, but all of them are visual for me
i'm a stay but i'm rooting for btob too, btob seems to have a special place in my heart
다들 스릴러 뮤비 말 나올때 조용히 난 계속 봤다고.. 섹시하잖아.. 빛나오는 건 어쩔수 없다고...
Waw...Hyunsik and Sungjae *really* fit this thrilling,mysterious, dark style. They really stood out to me in this MV a lot. And it's ironic because their both my bias, and I'm not saying this to be bias, they just really brought out the thrill feeling.
isn’t this song a masterpiece? the arrangement, the drums, the string instruments, the piano. they’re so perfect. anyway, im shocked at how old this song is. my childhood 😭
illhoon slayed my existence
x2
All I think about is marrying Ilhooni
GAYS ON ICE Giving you the like not only becuse I love Ilhoon but Yuri on ice too ♡
True..! how can he pull off both sexy and cutie baby all at the same time!!!!
Which one is he please?
Im here because of skz rumor covering this masterpiece. Why did i discovered this only noww!?!?
Thank u stay for checking this out .
Yes me too. This song is so good!
I can't believe it has only 10M views??
And I can imagine SKZ distribution line of this song already...
There are lot of bop song from Btob. Check them out
@@sairnai6105 we're not good in streaming. Thank you for visiting here
Thank you for coming here. 💙
2020 anyone?. Omg i love all their songs. Imisstheeem
Yes Me too.🖐
Me too
With you ✌🏻
I used to bang out to this song so hard. Now I don’t even listen to kpop anymore😆
Yesssss
A Melody since 2014 and a STAY since skz predebut... So excited for SKZ cover of this!!!
Ilhoon slayed in this vid
S L A Y E D
his expressions were so amazing oh my
this song was prob too early for its time. the vocals, choreo, and whole concept is a masterpiece! it deserved number 1
Especially since they had a primarily Korean fanbase at the time. This kind of concept would hit hard for international fanbases now
Wow this song is really good, came here after the rumor. I really hope it is true Skz do cover it ♡
Our second time meeting melodys hahaha first spoiler was skz covering I'll be your man and now this ^^ as long as skz gets to cover btob then I'm all good! I'm a 2nd gen fan btw, I miss this era sm
Yeahh me too, miss this era so much. The hair and dress ugh i love our emo boys. excited for both the stages
I just dropped by Back Door and now I'm here 😂
I miss BTOB 🥺
Oh i‘m a stay and doing the same rn loll and i have to say I love this song very much and am really excited to see skz and btob cover each other if the rumors are true. Also I‘ve come to realization that i really love btobs music 😌
@@MB-wi4ym I'm very much excited too! I've been checking every Back Door stages in between streamng 😂🤗
Me too i checked back door.. gosh!! Im nervous for BTOB..
I'm a melody since BTOB debut and I'm baby stay (4 months)
I'm here coz rumour that Stray Kids gonna perform this song oh that will be daebak.
Why is no one commenting about how perfect Hyunsik sounds and looks like here? :-( he needs more love!
This song is so underrated :(
why?
Min Ah Kim It didnt get the number of views that it should deserve :)
I feel like not enough people talk about or appreciate Peniel. I understand that he had little to no lines but he's so cute and adorable yet I couldn't find any comments about him. He's so under-appreciated and it's just ugh!
but melodies loves him so much..a shy but cute adorable peniel shin, actually, he improved a lot since debut and sings/raps line more now...as well he contributed also in composing and rap making.
+Hannah Banana I know right. Like HE US CUTE OMG!!! But so far....I barely have heard ANYTHING from him. I came here from his times at ASC, Illhoons collab with Hyuna, and School 2015. Peniel is like my bias yo (even though Sunjae is ma bias wrecker) I feel like I can connect with.
Nina_Armstrong Hidashi
He has such a great personality too
people need to appreciate him more becuase honestly he is the most adorable person ever!
ps (he's my bias too)
Hannah Banana KR!!! he is like.... oh so cute!!
+Hannah Banana I'm super new to the fandom and Peniel is my bias, he's so adorable and funny.
Stray Kids - Thriller
Btob - Back Door
Awesomeee!!!!
눈에서 레이저 나오는거 레알 병맛이야ㅋㅋㅋ
그와중에 존잘ㄷㄷㄷ
보컬 실화인지도 궁금하네
대단!
노래실력+랩실력+외모+예능감+연기+멜로디(팬들)=비투비
ilhoon's and chagsub's visuals are everything in this video. Thriller era is definitely their era. 😍😍
Hoping that the rumors are true I want to see how skz perform this and BTOB performing back door huhu can't wait for the both groups.
Who else is here after finding Stray Kids may perform this song in Kingdom!
Im here because the rumor that skz do the switch song with BTOB sunbaenim in Kingdom and they will perform this song meanwhile BTOB sunbaenim perform BackDoor
This was a good song sunbaenim, BTOB never make dissapointed.
I can imagine how changbin will do the rap, han will do the high note, chan do the reff, and other member too.
Same! Can't wait for it 😍
애들 다 화난표정인거 왤케 귀엽냐...
Came to listen because there is a rumour that SKZ are going to cover this for kingdom and I really love the song!
About a year back someone commented on some EXO mv channel that BToB vocal can be compared to EXO vocal. I became curious and started listening to this group's songs. 1 year later I am a regular listener of BToB songs.
Changsub best look. He slayed with this hair and tattoos
이때 성재 고3인데 저게 고3인가.....너무 멋있는데....
헐....존느잘...
아 ㅇㅈ이요
으앙 쥬금
성재야한빈아 진짜존잘이쥬ㅠㅠ
Hey can they please let all the rumors true... Like i don't want to have false hope again. But either way if Stray Kids will cover this, I won't say much bc i know they can give justice to this song.It's also been a long time Thriller was asleep. Fighting to everyone!!!
I like BtoB songs especially Missing U. I really look forward to the collaboration of SKZ-BtoB, I hope BTOB will be more successful and known to many people. they have good vocal, ahh and i'm missing Sungjae😭
THIS WAS LITERALLY MY FAVORITE SONG THOSE DAYS and if the rumors are true that skz will perform this, I'm going to FLIP
U gonna do flip brother 🤓
ilhoon is the only one who can look creepy and handsome at the same time:)
Omo Sungjae looks so good im crying.
my little Marshmallow
Because I Love SungJae, so I Love BTOB too ^^
SungJae fighting ^^ You're The Best ^^
2024년에 이 곡으로 입덕했다하면 믿어주냐구…….
ㄹㅇ무대보고 반함
그럼요 ㅎㅎ 걱정마요😊
so the rumors SKZ will cover this song for Kingdom...I'm anticipating it !!!!! let's go SKZ !!!!
Any melodies come back here with serious nostalgia lol?? This was actually my favorite era because everyone looked so good 0_0...
meee... i love this ere, i want hit btob back....
me too..I love this era. the outfit, performance..love them
I'm Buddies, BBC and ELF.. However now I turns to be Melody too since I know Hyunsik from Weekly Idol.. He is asdfghjkl !!!
ล
trueee!!!!
I fell for btob after watching kingdom.. can't wait for my ults to cover btob and vice versa.. If the rumours are true I can't wait for the backdoor cover
came to check the song on hearing that maybe skz would cover it and omg its a banger!!!
wishing the very best for btob.
I personally think that Thriller's era is the best for ChangSub '^' He kills everything here "-"
Nell H ikr :"> He killed everything when he was a prince and changed to a vampire here then he kill me when he's a madman in You're so fly lol xD
I can't stop laughing and I wonder how can a cool guy become a very-crazy-guy-but-still-cute like that =)))
Huynh Vy Haha sure he can kill when he wants that's it :')
For me I wonder more how a so crazy guy in real life can become so cool like this '^'
Nell H hahaha I think maybe he's just crazy whenever he wants lol xD sometimes he tries to make brand-new-image-idol and acts cool but we all know how crazy he is =]]]]]
So I'm waiting in impatient about BTOB comeback now... R'n'B Ballad lol Is Changsub still going Insane like that? =)))
Huynh Vy Haha Yeah we all know his real personnality, he can't hide it :3
Yesss I'm so impatient too to see them with a new concept in which I hope ChangSub will be able to kill us again :'D
Vy Huynh hehe *OUT OF BLUE* anneonghasseyo inspirit! your and my pic makes "WOOGYU" :p
After Skz Introduction Stage i came here, the green lasers reminds me of this MV, and there's a spoiler that Skz will perform this song... I can't wait anymore
Thank you school 2015
Amitha Alex i know what you mean lol
Team Taekwang
Amitha Alex YES. Sungjae is an amazing actor, I couldn't believe it when I find out he was in a kpop group and hadn't done much acting before.
The.beginning is scary. I AM ONLY 8
B2STY 4EVER you have good taste 😜p.s:I wish he will win the girl 😣
This song has SO MUCH potential! No wonder SKZ picked this one.
All stays, welcome to Btob thriller era...an era you might not even know exists. enjoy! this is a good song, trust me:)
HOLD UP IM GETTING INTO UR FANDOM
@@shavvlia6677 oh we are holding the doors open for you! just don't 'stay', come 'inside' and 'stay'!
@@iamvoldy4583 I saw what you did there😅
wait i dont know this song exist and im a melody since 2015 what even😭😭
ilhoon's part is killer point of this song
2019에 보는데......
저 번쩍이는 눈은 정말이지...할말이 없다....
Been here from Kingdom, i really hope ilhoon will stay with BTOB, he's one of among top three rapper in industry... 💙
두눈 빛나는거 개무서워 했는데.... 이제보니까 넘나링 귀욥따,,
I knew kpop since more than 10 years and I am ashamed of myself for not knowing about this masterpiece until now.. I came here after hearing that skz might cover this song! this is lit!!
I think is the second time we think BTOB and SKZ will exchange songs haha wowW it's a shock watching them like this instead of calmer sings but it's really good !! Eunkwang with pink hair wowW I can see SKZ covering this, maybe that's why Seungmin is singing so hard lately mmm
The composer of this song it's the same of Surrender new BTOB's Changsub solo song amazing versatility. 💙
Came here bcs spoiler from kingdom.
Skz will perform this song
yes, i'm too
me too
Really??
Lol,they performed Ill be your Man sadly.
It would have been nice if they got to do this song for real
Got to know BTOB because of Goblin's Sungjae. Now, I love them all. They are sooooo talented and funny. I'm a fan! ❤️❤️❤️
Welcome to melody sister
@@ritzelgeoleondry5149 try watching them in variety shows and contests. It gets funnier and funnier on the variety shows but you'll be amazed how serious and amazing they would be on professional stage. You'll love them more
I will never understand why this Mv has only this number of views . The song , the video , the dance , everything is so perfect !
exactly.
People just dont..... they dont know kpop
Ов❤💍
I am here after Kingdom. Thanks for this masterpiece!
thank u stays for dropping by here!
There's a rumor that Stray kids will perform this on Kingdom .
Yes they (Straykids) will perform this next week
hi im a stay and i heard skz and btob are gonna cover each other's songs! 🤩 i remember that i was obsessed with this song when i was 11 years old 😄😁 haha i will be veryyyyyy happy if the rumours turns out to be true~ if its not true, i will still support btob bc i like them!! btob & melodys fighting~~ ❣️❣️
Rumors says that Stray Kids might cover this and BtoB will perform SKZ's Back Door (based on pictures of their clothes).
I hope it's true. 🥰 This song is so good.
I miss the era when the comebacks we are about full impact and powerful songs.. This concept of BtoB and also majority of BAP’s.. One Shot and Warrior..
Okay but can we talk for a moment about Eunkwang's and Changsub's vocals and dark look?🙏😍
Vibing this song before and now Skz will cover it? Im so happy T_T
ถึงจะผ่านมาแล้ว8ปีก็ยังฟังอยู่ค่ะ
I miss old kpop vibe.. this song is legend
I really want Stray Kids to perform I'll Be Your Man but if they do this song is going to be ICONIC too
Anyone marathoning BTOB music videos? I miss them so much😭😭♥️♥️
눈에서 불나오는거 지금보니까 왤케 웃기고 귀엽냐그 ㅋㅋㅋㅋㅋㅋㅋㅋㅋ
Ilhoon kills me everytime
Alice and Hare somehow to me ilhoon looks like hes 16 in this maybe cuz his hair is up
true !!! 💘
T R U E
True
He was only 18, a month away from 19.
Came here again for nostalgic purpose & also to check out if Stay already here and yess i was right.. LOVE YALL STAY😆💙
This song is awesome i fell in love since first listen
We love you too Melodies!! Fighting!
So apparently $kz are going to cover this song on the next episode of kingdom....
Some rumors says stray kids gonna cover this , woah it really suits them, Stay FIGHTING
Minhyuk's arms.... Wowzie!
I'm a STAY but I'm really glad more people are checking out BTOB's songs since they're one of the few groups that got me into k-pop (along with GOT7 and Day6) back in 2016. Sooo excited for them to perform their own version of Back Door!
rumor has it that skz will perform this sing on the next round of kingdom and oml i can definitely see them performing thIS
Lagu BTOB paling favorit, berasa langsung 'klik' pas pertama kali denger. Apalagi bagian rapp nya Ilhoon dan Minhyuk, suka bgtttt..
ok another rumor skz gonna cover this and btob's doing backdoor... I'm honestly so excited!!
Soo happy when BTOB popular and found many english comment in btob video. Fighting BTOB Melody💪
Lets be rich😇
Came here again bcz rumor stray kids have to cover this awesome song. Can't wait.
Also can't wait btob if true cover stray kids back door.
#Melodybtobfighting
#Melody
Ilhoon the kinda rapper that could have taught people and like people would respect him and all that ;-; cries
Kingdom has got me hooked on BTOB
🤭🤭🫂💙
Stay here checking what Skz will perform and I am SHOOK this is such a masterpiece how did I only found out about it now aaaaahhhh I'm so hyped
I listened to thriller around 7 years back when I was a newbie in k-pop. Loved it back then. Listening to it now after 7 years. Never knew it was from btob. Have been obsessed with btob's songs lately. One of the most talented groups in the industry 😍😍😍
BTOB music kinda weird, we listen in 2022 and somehow it's still suit trend now day, if it's being song for famous 4th gen boygroup, it's will really be famous internationally
I THINK SKZ GOING TO PERFORM THIS AT KINGDOM THIS WEEK