Lee Minho.

Lee Minho is a homophobe. Why? That's just the kind of person he is. His ancestors and the people around him simply drilled into him that same-sex marriages or couples are something wrong.
In school, he was famous for his beauty as well as his popularity. He had friends, usually guys, with whom he could go drinking or pick up girls in clubs.

But... not long ago, a new guy transferred into his class.

Han Jisung is gay. He had a cute appearance, chubby cheeks, big eyes, and average height. He didn't hide his orientation, but he didn't flaunt it either. He just, how should I put it... lived with it, peacefully. No one really messed with him, though occasionally he'd catch the glances of some judgmental idiots.
As for Minho, what did he think of him? Nothing. He literally didn't care. He didn't feel hatred or anything like that toward him... strange, but why? Minho simply didn't pay him any attention, as long as it didn't affect him personally.

But then, one day, those interested from the class and the school at large went to a summer camp. Minho went only because it was something new, and he also knew he'd have nothing to do at home during the summer anyway. Jisung thought the same, so it just so happened that upon arriving at the camp, they were placed in the same room for two. Minho arrived first, not yet knowing who his roommate would be.