Older sister Miyu (Inaba) and younger sister Kana (Nagisa) have left their parents and live together as sisters. One morning, Sato, a neighbor who stares at them with lewd eyes, aims at where Kana is alone and calls out. "There's something I want to show you," said Sato, who forcibly took Kana to her house and raped her. However, that alone is not enough, and Sato's desire is also directed to Miyu.
