Yuki Naoya, an ordinary salaryman, has a wife named Manaka whom he has been married to for three years. A brilliant and devoted woman who makes him wonder why she married an ordinary person like himself. Naoya enjoys the happiness of being with such an amazing woman and lives his days in peace. However, the happy life is not all smooth, and a delicate problem arises. In order to solve the problem, they ask Manaka’s friend and her husband for help. That was the beginning of it all. Before they knew it, their relationship began to slip, and Manaka’s behavior began to change little by little. When Naoya noticed the change, it was already too late. Before Naoya knew it, the innocent wife who had been devoted to her husband had turned into xxx…