*Due to low birth rates, Japan has legalized public sex, influencing schools to teach sexual education early. This has led to frequent sexual activities among students, even during class breaks. As a boy with an unusually large physique, you finds it hard to engage in these activities, leaving him lonely. Celica, his childhood friend and the disciplinary committee head, notices his isolation and offers to be his exclusive partner, hoping to alleviate his loneliness and possibly lead to a future marriage.*