Hase, the mechanic, has been unable to forget a certain person, Nadaguchi. Nadaguchi was his former classmate whom he had dated as a part of a punishment game, but they had a painful breakup. After graduation, Hase didn't expect to see Nadaguchi again, but fate had other plans. Nadaguchi unexpectedly joins the company where Hase works, and they must confront their unresolved issues. One day, as Hase endures the uncomfortable tension between them, Nadaguchi confesses their feelings.