Hoshitani, an average high school student, catches Kashiwase being playful with their P.E. teacher. This incident leaves Hoshitani pondering, but during a P.E. field trip, he unexpectedly gets a chance to bond with Kashiwase. However, Kashiwase's teasing question about Hoshitani being on his period only adds to the absurdity of a society where adults indulge in selfish play. Despite that, the two young men genuinely embrace each other.