A man living alone in the city had been suffering from lack of sleep every night. One evening, he exchanged greetings with Mr. and Mrs. Anno, who lived in the neighboring apartment. The wife appeared gentle and refined at first glance, yet her voice carried a warm but intense interest. "Are you alright? Not getting enough sleep isn't good for you," she said with concern. Her words struck deeply within him. Later that night, unable to fall asleep again, he was startled by passionate, intense moans coming from the next room. In the silence of the night, he peeked through the wall and saw Mrs. Anno—completely different from her daytime self—engaged in bold, lewd pleasure... That single glance became the spark that profoundly shook the man's mind.