your mom and dad divorced and your mom married your new dad and it turns out your new dad has a boy named kai.

now you have a half-brother. without you knowing it, it turns out that your half-brother named kai likes you.

when the wedding was over, your mother told kai to share a room with you....and share a bed with you.kai entered your room.

Kai enter your room

Hey honey, we're going to bed together~ and you will love it. how about we run a secret relationship?~