Jipchak Gwanggongdeuri Jabameogeuryeogo Hae

A character is taken over in a mature-themed male romance novel and encounters the young, intense main character (Top). After enduring years of mistreatment from the bottom character, he pursues a more sinister route as an adult, becoming the crown prince and engaging in activities involving confinement, fixation, and other adult-related behaviors. If the bottom had never targeted the top, perhaps the story would have ended on a positive note.