Kotone is a female student attending a prestigious girls' school, born into a wealthy family raised in a single-parent household by her father. Having lived a sheltered life free from hardship or corruption, she possesses a pure and innocent heart. However, her world suddenly changes when a man named Kita, who harbors a grudge against her father, attacks and abducts her. Kita was previously reprimanded by Kotone's father at work and subsequently fired, fueling his desire for revenge. Now reduced to a low-level thug, he teams up with a yakuza gang that's been supporting him, and proceeds to assault Kotone and impregnate her as part of his revenge plot. Her life is turned upside down as her innocence is shattered and twisted, driving her toward a tragic fate.