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…

To help Minwoo, Mal harasses the café manager who bullies him. Meanwhile, Hyun asks Sungmin about An’s past. Seeing them talk, Ju-hyuk—who likes Sungmin—makes a move…

Minwoo tells Hyun that Mal moved in with him. Ju-hyuk tries to get Sungmin’s attention by bringing up embarrassing stories. Hyun, meanwhile, partners with An for a shared hobby assignment.

An wakes up in Hyun’s room and hugs him from behind while Hyun prepares breakfast. Mal and Minwoo enjoy a peaceful lunch in the park. But Sungmin is distressed, unsure of Ju-hyuk’s true feelings.

After winning a game competition, Mal invites everyone on a glamping trip. As they laugh and play, Hyun feels awkward seeing everyone openly affectionate. He pulls An aside to kiss him…

Hyun has been searching for Kim An since enrolling in university, though they’re at the same school, he can't find him. Meanwhile, Minwoo begins avoiding his childhood friend Mal. One day, An finally visits assistant lecturer Sungmin to request a locker…

Hyun sneaks into An’s “Marriage and Family” class. Expecting a happy reunion, he’s surprised when An acts cold and pushes him away. Meanwhile, Mal spends time at the café where Minwoo works, unaware of what’s troubling his friend.

The next assignment is to introduce a friend. An claims he has none, but becomes tense when Hyun says he met one. Hyun invites him to lunch, but their closeness draws stares in the cafeteria.

While Hyun introduces Minwoo and Mal to An, Minwoo’s girlfriend, Sara, shows up. Mal gets upset and lashes out at Minwoo. Just then, Lee Si-woo appears and declares he has a deep relationship with An…

An misses class, worrying Hyun. Mal visits Hyun for advice about Minwoo. Hyun tells him to think deeply, prompting Mal to comically try all the internet’s “thinking methods.” Meanwhile, Ju-hyuk enjoys flirting with Sungmin.

An ends things with Si-woo and leaves the building looking dejected. Hyun walks him home and helps clean his ransacked room. Sungmin, meanwhile, finds something shocking while searching behind the building…