Well, basically, it's like when the gap youkai, on one of the rare occasions that she is working, used too much greater strength than she intended to.

"Rare"...

Then what about Ran-sama?

I just omitted her.

W..why!?

But after telling me this much...

Chen.

Eh! W-what is it?

There are things in the world that one is better off not knowing.

Huh? b...but...

There are!

T-then the cure! Please tell me how to cure them!

If it is because of youkai strength weakening like I said earlier...

Then by restoring the youkai strength...!

Right.