Saitou-kun to Satou-san

College freshman Takayuki Saito collapses during the entrance ceremony and is caught by sophomore Hitoshi Sato. Believing Saito needs care, Sato takes an interest in him, unaware that Saito's fainting was due to excessive partying. Saito proves to be more unpredictable than expected. In another story, Chomaru, a former DJ, captivates a playboy with his charm. A summer incident occurs, followed by a memory and an event involving a winter butterfly.