Yijeong only sleeps in his boxers, regardless of the season, weather and place. His boyfriend Kyungil has no problem with this; until they stumble outside in the cold autumn winds due to a fire drill in the apartment... And there's only one shirt. For two people.

He's changed. He's never gone out late, drinking and partying. You were told that's what he did before he asked you out. You and him begin to drift apart. What's going to happen to your relationship?