Hibiki lost her father when she was young causing her to drown in sorrow. That's when the person who rescued her from the days of depression appeared: Kenichi Gouda, the heir of the Gouda Kendo dojo she attended. Hibiki was able to recover from his sunshine-like brightness and became friends with Kenichi. Eventually, the two became engaged. But just as when they were excited about a happy future ahead of them, Kenichi's mother fell ill and passed away soon after. Following her death, Hibiki decided to help the Gouda family in any way she could. Because of Hibiki's desperate dedication despite having a hard time with the unfamiliar household chores, Kenichi and his father soon regained their former vitality. However... As they spent more time together, Hibiki was sexually assaulted by her stepfather. She tried not to worry about it, thinking that he was probably feeling extreme loneliness after losing his wife. But not long after, the stepfather crossed the line... He took Hibiki's virginity and defiled her pure body... Just what exactly are the stepfather's true intentions?