After one failed mission, ambitious investigator Azu Amatsuki is demoted to a remote village where nothing ever happens. There she meets Oshima, a local officer and legendary former investigator. During a rainy undercover assignment, her soaked clothes turn transparent, and Oshima forces a hug and kiss on her before finishing inside her as she resists yet responds to the pleasure. Though she knows it is an affair, Azu gradually replaces the excitement and purpose she lost with physical pleasure. Soon she seeks him out herself, sharing deep kisses, pressing tightly against him during sex, and begging repeatedly for creampies until the pair lose themselves in each other's bodies.