Seo Hyunjin, a student in the Korean Language Education Department at Korea University, has been in love with his senior in the same department, Sun Jungwook, for seven years. However, since Jungwook considers Hyunjin as his junior, the outlook for Hyunjin's love life is bleak. Meanwhile, Hyunjin feels a sense of crisis when Chanyoung, who has exactly the same taste for Jungwook, appears! "I like Jungwook hyung. In the sense that I want to sleep with him and touch him." To make matters worse, Chanyoung asks Hyunjin to help him get along well with Jungwook. Hyunjin tries to protect Jungwook from Chanyoung by any means possible, and Chanyoung tries to steal Jungwook away just for fun! What was the one thought that occurred to Hyunjin at that moment? "If it's just for fun, then it doesn't necessarily have to be Jungwook hyung, right..?" Will Hyunjin be able to regain his purity?!