Kanojo ga Separate wo Matou Riyuu

Amane Kujou is a virgin girl frustrated with her chaste boyfriend, who only kisses her. She channels her energy into the track and field club, but her strong sexual desire, typical of an athlete, fuels her growing frustration. To make matters worse, a middle-aged man can't stop staring at her provocative athletic uniform.

Living alone in an apartment, Amane indulges in nightly masturbation. Unbeknownst to her, the middle-aged landlord secretly records her behavior. In exchange for deleting the videos, he demands a one-sided physical relationship. Though unwanted, Amane's unsatisfied body begins to crave the man's touch more and more.