Chiharu and Chiharu are married for three years. They have been trying to have a baby since they got together, but they have not conceived and their relationship has become awkward. When Kenta consults with her about their relationship, Chiharu it a "stimulating sexual experience" and licks Chiharu's body in front of Takaki. Kenta's wife Maina then seduces Takaki and performs a passionate blowjob with her saliva dripping down her face! Seduced by this devilish couple, Takaki and Chiharu become addicted to passionate swapping, with repeated massive vaginal ejaculations.