Suzuki always hangs out with his close friend Kawasaki. One day, Ayu, the girl Suzuki has a crush on, comes to his house. Kawasaki suggests they have a study session together. That night, Kawasaki and Ayu stay over at Suzuki's place. In the dead of night, Kawasaki, who was supposed to be sleeping next door, is nowhere to be found. When Suzuki goes looking for him, he catches them in the next room engaged in lewd acts… Ayu, despite her innocent appearance, is a student with a voracious sexual curiosity…
