Keitaro Urashima promised a girl when he was young that they would meet up again at Tokyo University in the future. Sadly, in the National Practice Exam, Keitaro ranked 27th from the bottom. Knowing his grandmother owned a hotel, Keitaro intended to stay there while continuing his studies for Tokyo U, only to find out the hotel had long been transformed into an all-girls dormitory. Through an odd twist of fate, Keitaro eventually became the manager of the dorm, beginning his life of living with five other girls.

Teacher Nano Saikawa hasn't given much thought to marriage, but her father's friend wants her to have a marriage interview with his son, Souichirou Takamiya. After the interview, they spend the day together. As they gradually become more comfortable with one another, Souichirou asks for her hand in marriage. Things quickly heat up between them, and the two wind up in bed together. However, when she removes his glasses, she discovers he is not Souichirou; he is actually one of her problem students, Souji Kuga! Souji's explanation is watertight: when he realized his brother was to be Nano's intended, Souji posed as him in order to be with her. And what's more, he is even confident that his family will approve of their marriage. However, an illicit relationship with a student is the last thing Nano wants. But will she be able to resist his charms, especially when her body begins to ache for his?

Shizuka Kominami is a shy college student who, despite her bashful demeanor, attends a college mixer. There, she meets Ryou Kirishima, a beautiful, confident woman whom she quickly befriends. After leaving the mixer together, the two spend the night talking and drinking. But when an inebriated Shizuka ends up at Ryou's apartment, one thing leads to another, and she finds herself being seduced by her new friend. And what's more, Ryou is actually a crossdressing man! After a passion-filled night, Shizuka awakens to a note left by Ryou, promising more erotic moments between them later. How will Shizuka's newfound relationship with Ryou unfold?

Two weeks have passed since the dilemma between Maiku, Karen and Miina was resolved, but their lives are more hectic than ever. Karen has become possessed in her newly discovered brother and Miina is desperate for attention as well, which leaves little time for Maiku to concentrate on his work. Therefore he decides to head out in the woods and set up a camp, where he can be work in peace. But, as always, we have Morino who is up to no good. To make things a bit more interesting, she organizes a field trip to Maiku's camp site, and encourages everyone to make some good summer memories.