My girlfriend, Rin, was repeatedly penetrated without a condom by an older cleaning man, and she was lost in pleasure. (DASS-498)

Yumino, a sincere student council member from the Literature Department, successfully confesses her feelings to Fujihashi, an academically excellent and athletically gifted student! After they start dating, Yumino is targeted by a janitor who secretly follows her around the school! He secretly photographs them kissing and other intimate moments, using this footage to blackmail Yumino and force her to have unprotected sex with unprotected sex! Afterwards, Yumino becomes the janitor's plaything multiple times, being "trained" by him. Although she is unwilling, her body gradually begins to feel something…