Tired of her husband's domestic violence and infidelity, Eriko seeks refuge at her sister's home. With her sister away for work, Eriko is welcomed by her brother-in-law, Taichi. After dinner, Taichi suggests drinking to cheer her up. As Eriko gets drunk and starts laughing brightly, Taichi feels relieved—until that relief quickly shatters. While Taichi is in the bath, Eriko enters naked behind him, saying, "Let me wash your back." Before he can react, her hand reaches for his crotch...