“The back of the body is sweet and numb ... I can't stop feeling good ...!” Ichika, who works for a life insurance company, reconnaissances as a customer to investigate the rival company “Rubide Insurance Company”. Visited. That's why I met Ai, the mysterious handsome store manager. “We will give you all your wishes in exchange for your life.” Will you make your wishes in exchange for life? If you can do that ... “Yes, we are not humans. They are devils who live on human life.” Ai, who has been eyed at the beginning, has been turned into a devil's toy from that day. A relentless caress, a tool that I have never seen before, a voice of a sneak peek at the ear ... I'm really going to be a devils plaything...! ?