"My wife hasn't been in the mood lately. Since I met you, the frequency has been decreasing." Yuuta reunites with his friend from college, Toru. Toru got married four years ago, and his wife, Kanna, is beautiful and loves sex, and he boasts that "we still have sex three times a week." Yuuta, who is sexually starved and without a girlfriend, is frustrated. So he secretly visits Kanna and forces himself on her. Kanna climaxes despite resisting Yuuta's uncontrollable sexual prowess, and after Yuuta continues to cum inside her five days a week, Kanna finally becomes unsatisfied with Toru...