The Old Man Investigator Is Solving Incidents in Gensokyo

Friend, do you know Cthulhu?

Do you know how powerful a 96-year-old active-duty veteran can be?

Do you know Touhou?

If you know all of that, then this is the story of a 96-year-old veteran investigator solving incidents in Gensokyo.

If you don't know any of it, then this is the story of an elderly man who transmigrates and solves incidents with others, forging bonds along the way. (Probably.)

(This book is a dice-roll story.)

(Who knows what will happen later?)