Masaki Michishita, a "typical guy" enrolled in preparatory school, is running to the park washroom when he spots a man wearing a jumpsuit sitting on a nearby bench. The man, Takakazu Abe, then unzips his jumpsuit and exposes his penis, asking Masaki, "Shall we do it?"(やらないかyaranai ka). They then proceed to the washroom and have sex.