A mysterious DVD suddenly arrived in the mail. On it was footage of his wife, Nao Hamasaki, exposed in lewd acts—and her husband could only stand in stunned silence as he watched. They had been married for several years now, with no children yet. She was a devoted, caring wife, and he truly believed he was happy with their marriage. But recently, ever since she started working part-time, he'd felt their time together slowly slipping away. Today, she said she was going out to play with coworkers. As a responsible husband, he told himself he could accept that. When he returned home, the DVD was in the mailbox. With his wife gone, he had no choice but to watch it alone. Inserting the first disc into the player, he saw her on screen. Beside her sat a sleazy-looking, otaku-type older man.