Kim Hanbin is a member of IKON, and they're about to debut.

Lee Hayi is a soloist that already debuted.

Kim Hanbin is the leader of IKON, so he doesn't put his mind into anything other than becoming the best, and in the middle of "becoming the best", a sudden challenge is given by YG in the show "Mix and Match".

A collab.

A collab with a female.

A collab with Lee Hayi.

The thing is, all of the girls had a choice as to what group they would want to collaborate with. But why did Hayi choose Hanbin's group?

It's simple. 

She wanted to impress Hanbin of course, and only him out of everyone.

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Lee Hayi, 19

Kim Hanbin, 19