Song Haneul - twin sister of Minho, she looks exactly like her twin. She agrees upon the request of her twin to be him for how long and after some time will she find her roommate attractive?

Jungkook - roommate of Haneul, after months of being the roommate of Haneul, he questions himself of his uality thinking that he may be gay.

BTS - friends of Jungkook.