The cartoon of the man with glasses calling the devil to make a deal is called Twilight. According to relevant information, Evening updates two episodes of animation every Thursday, telling that mustard seed edge is a "devil detective" who can summon demons to help him handle the entrustment. In fact, all the demons summoned are idiots. Can Sakuma Rinko, the strange demon and glasses girl's assistant, help mustard solve the entrustment smoothly?