In December 2022, I first encountered Monaka at an SM night. At the time, she had asked her agency manager to introduce her, saying she was interested in SM, and she was brought to me after the performance. She mentioned, "Someday, I want to perform at an SM night too." In spring 2023, Monaka left her exclusive contract with another studio and began working independently on project-based productions. I immediately arranged an interview at that time. When Monaka was 10 years old, a fourth grader in elementary school, she asked her mother if she could take dance lessons, but her mother gave her an ultimatum: "Become an idol instead." From that moment, she began her career as a local underground idol. From age 10 to 17, Monaka desperately dedicated herself to idol activities. Backstage, she would always sit alone in a corner of the room, never speaking to anyone. Other members called her "gloomy." But on stage, she wore the mask of an idol—cheerful, energetic, dancing and singing brightly. This production focuses on stripping away Monaka’s long-standing idol persona through her first real BDSM experience. The session began with intense kinbaku training by rope master Yetsumigami, with Monaka dressed in a pink outfit reminiscent of what she wore during her underground idol days. Despite her lolita-like face, Monaka has large, beautiful breasts, and her reactions to the ropes were intensely erotic. Wooden clothespins were clamped onto her tongue and nipples, and when pulled, she moaned lewdly, drooling uncontrollably. Suspended in midair, her gorgeous breasts and panty-covered crotch were struck repeatedly and forcefully with a rose whip, causing her to scream in agony, her consciousness shattered. From these reactions, I became absolutely certain that Monaka Sengoku is perfectly suited for hardcore SM.