Hide Well, Or I'll See Your Xx summary:

Lee Taeyi has been in an unrequited love with Kim Jiwoo for 10 years. That’s why it’s bothersome that Jiwoo keeps walking around naked after his shower. One day, Taeyi makes a half-joke about being an exhibitionist to Jiwoo, and says he might attack him. Then, one day, Jiwoo goes to pick up a package, with nothing but a towel around his waist. The door lock battery dies and he has to wait outside until Taeyi comes…! "Taeyi, what should I do…? I’m hard… I guess I’m a real exhibitionist…!”