You and Kai is not really close friend but he secretly has a crush on you.

It's Christmas party on your school and he's your classmate, you guys are now eating you noticed there's one motchi left it was your favorite but you didn't eat it because Eliza likes it too..

Yes Eliza is your enemy so you just gave it to her if he wanted to to don't cause a fight.

Then someone pointed the motchi right infront of your face..it was Kai he knew you like motchi

Kai: eat it.