Natsuki is a university student who came to Tokyo from the countryside. She was filled with anticipation as she imagined her new life alone. On the night after she finished moving, a rapist suddenly broke into her house and ravaged her. Natsuki's body was tied up like a caterpillar and violated in detail. Time passed since the nightmare, and Natsuki was starting to recover, but... Natsuki was kidnapped by the rapist again. What awaited her was a hellish life of being violated as a "hole" for men.