Convenient April Fool

What are your plans for December 24th?

A bullied girl with no sense of value for herself finds the Demonomicon and tries to summon a demon to her aid.

The Demon Lord shows his dedication to his job.

Yuki calls Arai to go to the school's rooftop. There, she asks a question on April Fool's Day.

With the last two soldiers in the battlefield, Bob starts to lament.

A disease that causes people to turn into trees.

A guy came to exorcise a spirit on a request, but found the spirit to be...

Expectations exist to be subverted.