Even Ghosts Have to Believe in Science!

Yufuku Ubuyashiki had a dream.

In the dream, he was guilty of terrible crimes. Not only had he caused the death of the doctor treating him through his disruptive complaints, he had harmed countless others, and even brought a divine curse upon his family, condemning his descendants to a terrible hereditary disease.

In the end, stripped of all honor and dignity, he died in misery in a dark corner that was little more than a storage closet.

After waking, Yufuku reflected deeply on his mistakes and came to a sudden understanding.

To hell with the blue spider lily. Becoming a demon wouldn't save him, and harassing doctors wasn't the answer.

He had already witnessed medicine a hundred years in the future. Coughing up blood was no longer an incurable illness, monsters no longer dared to steal children from desolate villages at night, and the dark streets were lit by the lamps of human ingenuity.

This had to be a revelation from Heaven:

Science and technology are the primary productive forces!

Theme: Break with feudal superstition and build a better life