Momoka is trapped aboard a stalled train during brutally hot weather, with the air conditioning broken and sweat soaking her body. An older passenger grows aroused by the sight and starts groping her when she has nowhere to escape. She resists at first but gradually begins to feel pleasure, and other passengers join until it becomes a foursome. They finish by covering her in cum. The experience awakens a taste for being touched on trains, and days later a businessman-looking stranger corners and gropes her again. Thoroughly aroused, Momoka follows him to a hotel, gets fucked repeatedly, and ends up creampied.