Whilst trying to find the Yokai Patrol concerning a case of bees causing people to become brainless, Harumi spots Enpi talking with the beehive demon behind it. Although Enma manages to outdo the demon, he and Kappaeru get distracted keeping a bee out of Yukiko's yukata and get stung, reverting their brains to infant-like states. As Yukiko and Harumi's attempts at taking over the main hero role fail, the demon challenges them to a series of events, promising to restore everyone's brains if they win more than half of them. However, during one of the events, the demon ends up ticking off Enpi and gets beaten up, allowing Yukiko the chance to reverse the nature of Enma's flame stick and kill the demon. They later return everyone's brains, only to get them mixed up.