Masumi is raising her son Takashi while working as a flyer poster, which is a job that involves distributing flyers to mailboxes. She distributes a wide variety of flyers, and recently she has been distributing more flyers for adult videos. One midsummer day, while she was wiping the sweat off her brow as she worked, she received a complaint from a resident of an apartment building, who said, "The product I ordered is different from what was on the flyer." However, it didn't end with just a complaint, as the resident was turned on by the sweaty Masumi and continued to do so...