Part 3/9:

During class, Kiyoshi drops a unique sumo wrestling eraser, catching the attention of Chio, a fellow student who also shares a passion for sumo. Their budding friendship leads Kiyoshi to accept an invitation to a sumo match, a bright spot amidst the boys' frustrating attempts at socialization.

Trouble Brewing

That evening, the thrill of camaraderie takes a wrong turn when the boys concoct a mischievous plan to peek into the girls' bathroom using a two-way video system. Despite initial hesitations, peer pressure leads Kiyoshi to participate, and chaos ensues when the phone falls inside the bathroom. This act of folly attracts the ire of the Underground School Council (USC), who punish the boys for their behavior, leading them to a month-long sentence in the school's prison facilities.