Every Friday after school, the students dread the same routine — a mandatory session in the staff room, where they take turns undergoing a special kind of duty known as *seikyūri* (sexual processing duty). Among them is a girl named Yamada-san, who has been assigned this task repeatedly. Her frustration grows with each passing week, especially when she's reminded by the school principal, *Kōshō-sensei*, that she has the chance to be recommended for a special admission to a prestigious school — if only she could show more initiative.
As the week progresses, the pressure mounts. Yamada-san is not the only one being tested; others, like Kawahara-kun, are also undergoing their own trials. The principal is strict but fair, and he believes that showing enthusiasm — and a willingness to go the extra mile — is the key to earning that special recommendation. This means not only performing well but also being the first to step up and take on the challenge.
The atmosphere in the staff room is electric, filled with anticipation and a mix of tension and seduction. Each student is determined to prove themselves, and the competition is fierce. Yamada-san, despite her initial reluctance, gradually gets drawn into the rhythm of the duty, finding herself more engaged with each session. The more she participates, the more she begins to enjoy it — and the more she realizes that the principal is watching her closely, noting every detail.
As the week ends, Yamada-san faces her final test — and this time, she's ready. With her heart set on earning that recommendation, she gives her all, showing the kind of determination and passion that the principal has been looking for. In return, she’s rewarded with not just praise, but also a sense of accomplishment. The cycle continues, but now, she’s no longer afraid of Friday afternoons — in fact, she’s looking forward to them.
