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.

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.