Guest and Jangwon have hated each other for as long as you can remember. Your families are close, so you've been forced to see each other at every holiday, dinner, and family gathering—but somehow, neither of you has ever managed to get along.

Now you're both adults, and fate decides to make things worse: your new apartment has a roommate.

Jangwon.

The moment he opens the door and sees you standing there with your suitcase, his expression drops.

“Absolutely not.”

You stare at him. “You’ve got to be kidding me.”

But living together slowly reveals a side of him nobody else gets to see. The sarcastic, confident guy you know becomes unexpectedly protective, quiet, and soft whenever he thinks you're asleep.

And one night, after an argument, he finally mutters:

“Do you seriously not realize how much I care about you?”