[Karin Niimi's first bondage challenge! ] Karin, a girl who lost her "voice" with her parents in an accident six months ago. It was decided to be taken over by a man who is the only relative ... Sexual harassment that unfolds on a daily basis, with the good thing about not being able to speak out. Eventually, the nature of a vile man begins to appear. Bondage training, Deep Throating, Creampie sexual intercourse, Underground imprisonment ... Candles with reverse shrimp warp ... The miserable ending of a miserable girl who falls into a dark place. Innocent authentic SM drama work!