While trying out the pancakes at a new neighborhood restaurant, Mephisto III and Akuma Kun remember the day they first met.

On a dark and stormy night, a ghastly looking man comes looking for Sanae. He turns out to be her husband, who's been missing for five years.

A university student asks Akuma Kun to investigate the strange deaths of two of her friends, who both died on the same exact date and time.

Akuma Kun and Mephisto III get invited to the home of a very wealthy client, who has a disturbing request — to summon Satan for his flesh.

At his wit's end, a landlord breaks into the apartment of a tenant who stopped paying rent — and discovers a gruesome, seemingly impossible murder.

After arriving in Easter Island to investigate a strange red nail, Akuma Kun and Mephisto III discover the body of a murdered young woman.

A famous movie director in his twilight years asks Akuma Kun and Mephisto III to find a long-lost, cursed film made by his dear friend.

After years of hard work, a long-time legislator is on the verge of becoming a Cabinet minister. But then, a threatening man pays him a visit.

Hina looks after Ichika, but danger still lurks nearby. Akuma Kun further investigates the case by making another visit to the Asanagi house.

Akuma Kun, Gremory and Mephisto III enter the barrier to save Shingo. But first, they'll have to confront Strophaia, an old enemy from Ichiro's past.

When Shingo — aka the first Akuma Kun — is sealed away, the father and son Mephistos set out to rescue him, while Akuma Kun takes a different approach.