Kanzen-naru shiiku: Himitsu no chika-shitsu

A shy, nerdy man, Takeru finds a schoolgirl hooker Lily is unconscious in a Tokyo park, so he decides to bring her home and lock her up in a secret basement. Although Lily is afraid of him, in fact, Takeru didn't do anything to hurt her. After Lily begins to uncover a shocking episode from Takeur's past, she gradually falls for him and they make love in this secret basement...