That is one thing, yeah, but not quite why.

This guy clearly used to be a human.

...Yes. It seems so, doesn't it?

There is another scary youkai.

They say it deceives humans and invites them to join his kind.

I myself find it so scary, I might end up being able to sleep only at night.

In conclusion... I need to exterminate the source, huh.

It seems this might take longer than expected.

...Hey, Reimu.

I know.