Hiroka and her husband were not getting along. Her husband constantly complained about everything she did, from the soup she cooked to rearranging his belongings. It had been a long time since they even held hands, let alone had sex. Hiroka had to masturbate to ease the loneliness that had built up over the years. In contrast, Tanaka-san, who lived next door, always cared for her, even noticing when she changed her hairstyle. Captivated by Hiroka's beauty and gentleness, as well as sensing her loneliness, one afternoon, Tanaka couldn't resist and went to find Hiroka. He wanted to bring happiness to her, to drive away the loneliness enveloping her heart. Feeling Tanaka's sincerity and the pleasure he brought, which her husband had never been able to provide, Hiroka accepted him. They continued to have sex with each other whenever Hiroka's husband was away. Hiroka thought everything would be okay, but in the end, her husband found out everything...