Three years into their marriage, Nogi Chiharu and her husband Takaki are struggling in their relationship. Despite actively trying to conceive since the beginning, they've failed to achieve pregnancy, causing increasing tension between them. When Chiharu confides in Kenta, he suggests they seek "stimulating sexual experiences" to revive their bond. Chiharu attempts to rekindle intimacy by licking her own body in front of Takaki. Meanwhile, Kenta's wife, Maina Yuuri, seduces Takaki, performing intense, drool-filled blowjobs. Influenced by this alluring couple, Chiharu and Takaki become deeply immersed in an intense partner swap, repeatedly experiencing creampie after creampie.