Four years into her marriage, Miori was worried about her life with her husband who had lost his job. At that time, Kubota, a businessman and a senior of her husband's from college, learned of the situation and offered to help her. Miori was happy without knowing anything about it, but Kubota had always had feelings for her... One day, when Kubota suddenly showed up, Miori welcomed him and was raped from behind by the lustful Kubota. Unable to resist Kubota's powerful thrusts, Miori gradually began to feel a pleasure she had never experienced before...