Jiwoo signs up for the "Marriage and Family" class, where students are paired in male-female duos. However, due to the surplus of male students, he is partnered with Roa, an older male student. Assigned a dating task, the two head to a vending machine to spend their budget wisely—when suddenly, Yuna appears…

Yuna, traumatized by a stalker, develops a fear of men. Jiwoo volunteers to walk her home daily, despite Roa's advice to let the police handle it. Jiwoo insists on helping, but on his way home, he's attacked. Roa grows concerned when Jiwoo becomes unreachable…

Roa breaks his arm protecting Jiwoo and demands Jiwoo become his "right hand." At Roa’s home, Jiwoo ends up washing dishes and even Roa’s hair. Meanwhile, Roa’s housemate Namjoon, who secretly has feelings for Roa, calls Jiwoo out…

Rumors spread that Jiwoo and Roa are dating after a mysterious post appears on the school forum. Overwhelmed, Jiwoo avoids campus. Yuna asks Roa about Jiwoo, but he accuses her of being selfish. Meanwhile, Roa visits Jiwoo’s house in the rain…

Roa, suspecting someone they know posted the rumor, begins investigating with Yuna’s help. They find the culprit and peace returns. Then, Yuna privately confesses to Jiwoo that she has feelings for him…

Jiwoo tells Roa about Yuna’s confession. Unexpectedly, Roa congratulates him. Jiwoo confesses his own feelings to Roa, who apologizes for misleading him and disappears. Unable to forget Roa, Jiwoo turns to Namjoon to find his whereabouts…