At the hospital where rookie nurse Riko Morita works, the head nurse keeps a close eye on her, especially her friendly interactions with a young doctor. However, the head nurse grows resentful and unleashes her irrational anger on Riko. The moment Riko inhales a mysterious substance, she loses consciousness. When she opens her eyes, the head nurse stands over her. A raised foot slams into Riko's abdomen! Her face contorts in pain as she trembles, then her chest and face are repeatedly trampled until she blacks out again. But the head nurse's fury doesn't end here... Later, Riko appears as a high school girl being mugged. Her attacker is Uezou, a fellow student. The timid Uezou has always been victimized by Riko's bullying. One morning, after Riko steals all the money his mother entrusted to him, Uezou returns home only to find his violent older brother waiting. After hearing what happened, his brother orders him to lure Riko out. Falling into his brother's trap, Uezou takes out all his pent-up frustration by mercilessly stomping on Riko. Screaming in agony, Riko is kicked in the stomach until she vomits gastric fluid. A brutal scene unfolds...