Shiiku no Heya: Rensa suru Tane (2004)

The third of the Shiiku no Heya series, Rensa suru Tane (2004) is the tale of Kenichi, the hardworking but painfully shy proprietor of a drycleaning shop who has secret violent impulses as the result of childhood abuse. He receives word that his ex-girlfriend has been kidnapped by an old cleaning man who says he and his victim had a "special understanding". One day a young female cop named Senri (Sana Ichimiya) comes to Kenichi's shop and he feels he has a "special understanding" with her, which leads him to tie her up and keep her prisoner upstairs in his shop. Kenichi has his way with Sana in multiple nude scenes.