The masterpiece of sister quagmire NTR based on the original work by Shoot the Moon has finally been made into a live-action film! Mariko, who lost her parents in an accident, and her sister and her younger brother Mitsuru, who was being bullied in class, were saved by Mitsuru's classmate Takashi. Mariko begs Takashi to help her brother until he gets back on his feet, and in exchange, he makes erotic demands on her. The demands gradually escalate, and eventually she is photographed with obscene pictures, and is threatened with rape using them.