She had been destroying people inside her imagination. Kuroishi Kiho is a high school girl who appears to be a model student at school and a caring daughter who devotes herself to her disabled mother at home. Quiet, gentle, and kind on the surface, she has secretly harbored an intense urge to hit someone her entire life. As her violent fantasies escalate day by day, Kiho encounters a street criminal and finally snaps, unleashing her pent-up rage on the attacker without restraint. Her raw, uninhibited violence is witnessed by REINA, a former star of women's MMA who immediately recognizes Kiho as a once-in-a-generation talent. REINA recruits Kiho into the world of professional fighting, convinced that this seemingly sweet high school girl harbors a revolutionary狂気 that can shake the foundations of women's combat sports. Kiho steps into the ring, where violence is not only permitted but celebrated, and begins her journey as a fighter. Her first opponent is the karate queen of Kansai, Airi Kobayashi, followed by the genius Muay Thai prodigy Love and other fierce challengers drawn to REINA's ambitious new tournament RMAWS. As Kiho fights her way through increasingly dangerous opponents, her past is gradually revealed: her origins begin at age three in a blood-soaked underground fighting ring, which forged her into a monster. Her backstory, the reasons behind her uncontrollable violence, and the burden she carries all come to light. REINA's vision of a global tournament brings together fighters with their own obsessions and desperate reasons to fight, while Kiho evolves through combat, finding both pleasure and meaning in the brutal exchanges. The story follows Kiho's growth as she confronts the strongest fighters in the world, her own monstrous nature, and what lies at the end of her violent path—whether hope, despair, or something beyond both. After a series of intense battles that test her body and spirit, Kiho must ultimately decide what she fights for and who she wants to become, culminating in a final confrontation that determines her fate and the future of women's MMA.