Professional wrestler Kaede Kamigaki

In the government, there was a secret organization
that had protected humans against a paranormal presence since ancient times.
The leading character, Kaede Kamigaki, was a member of that organization.

She received information that a professional wrestler was active in the
underground arena.
This was sponsored by the authorities,
and the wrestlers were gathered using a large amount of fight money.
And the winner would receive a large amount of money that would allow them to live as they please for life.