A beautiful girl in uniform goes crazy with the pleasure of the rope, and as the taste of rope is engraved into Kokoro and body, she falls into slavery!!! "A middle-aged man from the neighborhood is found drunk and collapsed. Mizuki comes to his aid. The man used to be a professional bondage artist. Mizuki is Kokoro by the sensuality and beauty of the bound woman. The man binds her almost forcibly. She feels a melting pleasure in the midst of the pain. She can't forget being bound by the old man. Mizuki becomes a slave and is tied up in earnest."