Kiriko Ragawa, 24, teaches mathematics at Heiwa Academy. She stands 168 cm tall, weighs 49 kg, and has measurements of 83-57-90. Her appearance features brown eyes and brown hair, typically styled in a short folded ponytail, often accented with lipstick.

A history marked by multiple traumatic assaults drove her to pursue extensive martial arts training for self-defense and retaliation. She now wields black belts in both judo and karate, actively employing these skills for protection. Female students at the academy see her confidence and resilience as a role model, while some male students regard her with objectifying intent.

A pivotal event unfolds when several male students, experienced in targeting instructors, confine and bind her within the school. They challenge her to endure ten minutes of physical stimulation without exhibiting arousal, promising release upon success. Despite formidable resistance and her initial use of martial techniques to incapacitate attackers, the encounter progressively erodes her psychological resolve, culminating in involuntary physical submission.

Her attire varies: professional settings feature a white shirt, blue miniskirt, and pantyhose; athletic contexts involve a gym uniform or bikini; martial arts practice sees her in a karate gi or kimono. These outfits sometimes become compromised during physical altercations.