Mito and Souta, a couple who are very particular about hygiene and are sensitive to smells, are bothered by a strange odor coming from their neighbors.A man named Gomi leaves his room with an unusual smell after masturbating, so he goes to complain but is ignored.Later, locked in Gomi's room, Mito is forced to have a first kiss that is far from her ideals, leaving her mentally devastated.Mito gradually feels pleasure from her smell and accepts sex with her Gomi.Souta visits again, and she witnesses Mito having lovey-dovey sex with Gomi.