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.
