Season 1

Yuki was responsible for tutoring 3 college kids. Ryo, Ri and Koji were regular college students, going to parties, playing their video games. But the studying suddenly began... These kids tie Yuki with ropes and shut her mouth with a ball gag. Yuki, who was to tutor these young kids, were forced to unwillingly give her freedom up as they peered deeper and deeper within here! In addition, these kids who were so eager to "study" and brought out their own "toys" and started teasing her body. Then next came their own... Yuki violently resisted as her face flushed a bright red. However, her body mercilessly falls under control of these kids her body discovers these new pleasures.