[Karin Niimi first bondage and hanging challenge!] Karin, a young girl who lost her parents and her voice in an accident six months ago, was taken in by the man who is her only relative... Taking advantage of her inability to speak, he sexually harasses her on a daily basis. Eventually, the man's true nature begins to emerge. Bondage training, deep throating, internal ejaculation intercourse, confinement underground... hanging in a reverse shrimp position from a candle... The tragic end of an unfortunate girl who descends into a dark land. An authentic SM drama of pure purity!