Gensokyo truly is a wonderful place.

A clean environment, a life free of boredom, all of this is waiting for you!

However to live in Gensokyo, there are some rules you must comply with.

That's the bare minimum.

...Yes.

Is that fair?

Then, rule 1:

Gensokyo isn't just home to humans and youkai, all kinds of things live here.

But in order to maintain Gensokyo's balance, the number of humans and youkai must remain constant.