Jun was very fond of his mother's best friend, Shizuko. Shizuko was a kind person who understood Jun during his teenage years. Jun was happy when he heard that Shizuko was going to stay at his house, but he accidentally saw Shizuko naked. He rushed back to his room, but he couldn't get Shizuko's beautiful body out of his head, and he used it as masturbation material. However, Shizuko saw them at the wrong time...