Protagonist Rinka's beloved little sister gets pounded in an underground ring, and becomes a shut-in from the trauma! Rinka then decides to seek revenge against the champion that mentally broke her. She enters the schoolgirl-only underground boxing

Underground female boxer training game specializing in fighting Ryona [Synopsis] Rinka, the main character who is the director of the women's boxing club. Her beloved sister was bumped up in an underground ring game and was withdrawn from the shock!