The day 'Dawoon' went with his classmates to drink like crazy, he then went home to sleep. In his dreams, he recalls a memory of when him and ‘Seojin’ met lips. Why did the 'mistake' he made in high school suddenly reveal itself in a dream? Dawoon, who thought his feelings had finally come to rest, Encounters Seojin, whom he's uncomfortable with. Unlike his usual self, Dawoon seeks out Dawoon to ask if he made some kind of mistake while drinking, but the answer he's met with is that they just kissed...?