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.

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

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.

A little boy goes into the Millenarianism Research Institute saying he wants to become a demon, but Akuma Kun immediately throws him out.

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

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.

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.