Through some unexpected circumstances , I became "masturbation buddies" with Yamada, a girl in my class. I was enjoying a fulfilling masturbation life, jacking off to the raw bodies of girls in my class as much as I wanted, when one day, our relationship was discovered by Fujisaki, a popular girl in my class whom I secretly admired ! And then, Fujisaki asked to join in as an "masturbation buddy" too...? Fujisaki hurt her hand and can't masturbate properly, so I helped her masturbate during every break... and Fujisaki came over to my house to masturbate!? Fujisaki and I became closer as masturbation buddies. Yamada was left feeling uneasy about this. The relationship between the three of us gradually began to change...?