Okada and Kato, students at 'W' [i.e. Waseda] University, in Tokyo, live in the same lodgings. One morning, Kato receives a tailor's bill. Okada has seen the letter arrive, so Kato tells him it's from his girlfriend. Shortly after, the tailor himself turns up and eventually spends the whole day sitting in at the students' lodgings. Okada, meanwhile, goes to the park with his girlfriend Miyoko and spends a pleasant day there. The following Sunday, Kato goes for a walk with his girlfriend Yuriko. Coming home by bus, they bump into the tailor, who berates Kato about the unpaid bill. This puts Yuriko in a bad mood. Later, the tailor comes to their lodgings again, and, unable to stand up to his pressing demands, Kato gives him Okada's clothes, which are in the next room, in place of the money he owes. Okada's father is due to arrive on a visit to Tokyo, so Okada has no alternative but to borrow Kato's clothes, which do not fit him. Miyoko arrives, then Yuriko also turns up. Misunderstandings ensue. But in the end, the two couples go on to enjoy the pleasant days of youth.