2x1: vol. 1
The sexuality of two girls and two boys... The teacher asks Akiyama, a geeky, bespectacled boy, and Ieda, a popular jock, to visit Noriko's house because she's been absent from school for some time. Akiyama and Ieda find Noriko, a pretty girl, alone at home. They assume Noriko hasn't come to school because she has a bad cold, but to their surprise, it turns out that she has another type of illness and she can't stop thinking about sex. Before Akiyama and Ieda realize what's happening, Noriko demands that they have a threesome. This intimate act bonds them as friends. Encouraged by Akiyama and Ieda, Noriko comes back to school the following week. She enjoys being back and participating in group activities. On the way back home from school, Ieda invites Noriko to his house, where Noriko is introduced to Miyuki, Ieda's friend. Alone in Ieda's room, Noriko asks that Ieda make love to her again. Miyuki hears them having sex. Meanwhile, Akiyama is tormented and he can't get over the sex he had with Noriko.