Kanan the “Gourmet Devil” has descended upon the human world with one goal: to gorge herself on youthful souls. Her first target is high schooler Youji Kyougi—except her plan backfires horribly! Instead of her meal, he’s now her…boyfriend?! Even though she’s lived for thousands of years, Kanan has never known love! Can a devil survive the dangers of dates, hand-holding, and her very first romance?

A number of inexplicable phenomena have been plaguing the town of Domori. In order to protect the town's children, a new homeroom teacher known as “Nube” arrives. Normally gentle and a bit outgoing, Nube has a secret side: he is, in fact, the only psychic teacher in Japan. Rumor also has it his left hand is possessed by a demon! Hell's messenger of justice is here to take on the school's seven mysteries, ghosts, and evil spirits attacking his students.