NCT Haechan and SMrookies Koeun "Noona and her little brother"

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I've a little typo on this video, i should type "her little brother" not "his" OMG i'm so sorry, my bad:/
And bye the way,
They are just a friend and looks like have a brother sister relationship
They are not a real siblings ok:)
Opening song: Red Velvet - see the stars
Credits to:
Eps 1,6-12: zeroTOone
Eps 2,4: the squares
Eps 3: yutamin_
Eps 5: sungjaelly
Thank you for your like, comment, subscribe, and watching:D