[Crossover] The Ordinary God-Tamer

In short, it's a story about Kageyama Shigeo, the protagonist of Mob Psycho 100, taking another version of himself's place and becoming a Saniwa.

I ship the Kageyama brothers, but incest is forbidden on Jinjiang, so Ritsu won't appear. You can read it as having no pairing.

Here's the proper blurb.

The strongest psychic, Kageyama Shigeo, has been chosen to become a Saniwa!

Shigeo: I didn't, I haven't...

Mikazuki: Hahaha, would you like to have tea with an old man?

Shigeo: Y-yes!