I went back to my hometown and contacted my ex-girlfriend, whom I hadn't seen in four years. Her name was Tsukasa Aoi. She was a famous AV actress. She wanted to confirm our love before getting married. As if to take advantage of my naivety, as she was about to propose the next day, Tsukasa began to aggressively pursue me. Even if we crossed the line now, it wasn't cheating. Because I knew that, the sense of immorality was irresistible. The perverted sexual intercourse in this borderline situation that didn't end even when morning came broke both my sexual habits and my sense of ethics...