Takahashi Ai - Suki-yanen!

[@Xyx_ql4]

可愛い笑笑

[@aes-2425]

宝塚に出れるよ愛ちゃん!!!!

[@MelonSodagasuki]

ガリクソンしばくぞゆわれてる笑

[@JohanJung]

吉川友（本人）カバー動画　MajiでKoiする5秒前(Homage Ver.)
Many thanks, I also found the above.

[@hironyx]

oops wrong song. should be "majide koisuru 5byo mae" マジで恋する5秒前. same singer

[@JohanJung]

What music is playing in the beginning?

[@Uknown341]

Dat voice tho

[@tungstenwhizard4361]

Ha-ha!

[@hironyx]

daisuki by hirosue ryoko. 広末涼子「大スキ！」

[@srrcsrr6195]

Lol