Ghastly Prince Enma Burning Up

As a girl named Harumi ends up sneaking into their school with her friends, she soon finds the faces of her friends have mysteriously vanished. When Harumi nearly drowns in a pool while trying to escape, she is rescued by a kappa named Kappaeru, who takes her to an underground base where she meets also meets the ice princess Yukiko and the fiery mage, Enma, who together form the Yōkai patrol, a group sent from hell to stop demons that appear on the surface. Determining the culprit is a face-eating demon, Harumi offers to lure out the demon so that Enma and co can attack it. Although Harumi finds the beast, due to Enma's laziness her face is also stolen by the time they arrive. Enma ensues in battle with the demon and, despite showing no disregard to the innocent faces while smashing it with his fiery hammer, manages to kill the demon and return all the faces to their rightful bodies.

While Harumi and her class are on a school trip to an amusement park, they are attacked by a Squid Demon named Walter Geso. Despite taking Yukiko hostage as well, Enma manages to free all the hostages and defeat the demon, albeit destroying the park in the process. Afterward, Yukiko and the others explain to Harumi how they were summoned by the Great King Enma, Enma's uncle, to travel to the human realm to stop escaping demons. Their first case involves fighting demons named Snakejar and Shock Willow. After the flashback, Harumi reveals that he teacher, Ms. Chiko, had been acting weird recently, and upon investigating her, they find a strange mark on her leg.

After learning that Ms. Chiko had been infected poisonous smoke from a demon known as Dokuro, designed to make her ripe enough to eat in three days, Enma engages her in battle but is forced to retreat before he can remove the poison. With the third day approaching, the Yokai patrol decide to have Yukiko take Ms. Chiko's place. After Yukiko and Harumi carefully obtain Ms. Chiko's underwear to wear in order to complete her disguise, Dokoro appears and is quickly finished by Enma.