Seung-hyeon, Joo-hee, Gong-ho, and Ki-young were high school classmates, but Seung-hyeon is often absent from school, so she is retiring. While Joo-hee, Gong-ho, and Ki-young enjoy their college life, Seung-hyeon feels lonely and troubled. Moreover, when Joo-hee, whom Seung-hyeon secretly liked, fal ...