Due to her impulsive youth, Hikari got married early. As a result, many things happened and she quickly divorced her husband. As a single mother, she had to work hard, giving up her own happiness to raise Rika to adulthood. Today, Hikari's daughter brought her boyfriend home. Hikari didn't want her daughter to follow in her footsteps, so she wanted Rika to choose her boyfriend carefully. That evening, she discovered the two having sex. Although Rika wanted her boyfriend to wear a condom, he adamantly refused and forced her to have unprotected sex. He also caught Hikari sneaking outside. While drinking alone, he approached her and wanted to drink with her. However, his main intention was to rape her. It had been a long time since she had sex, and she had grown accustomed to the feeling of loneliness and buried her desires deep inside. But he seemed to awaken her instincts, the instincts of a woman within her overpowering the instincts of a mother. After that incident, she learned the true nature of him, someone who only sees women as toys. She wanted him to break up with Rika and agree to use her body to replace the girl. But she knew she wanted to have sex, to enjoy this amazing cock, she was just trying to avoid the truth. And her worst fear came true, Rika accidentally discovered the two of them having sex...