In the dimly lit corridors of the deserted school, Kiriko stands defiant after fending off two of her masked captors, her martial arts training leaving them injured and wary. The remaining men, seasoned in their pursuit of other educators, respond to her police threat with heightened intrigue rather than retreat. They issue a precise wager: withstand ten minutes of their touch without yielding to physical response, and she earns her release. As the contest begins, however, a rising tide of sensation steadily clouds her thoughts and composure.