Perfect Education 4: Secret Basement

Original title: 完全なる飼育 秘密の地下室

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