Ron Kamonohashi: Deranged Detective(2020)

Kamonohashi Ron no Kindan Suiri

This unusual duo brings the hidden truth into the light! Ron Kamonohashi, a private investigator with serious issues, and Totomaru Isshiki, a pure-hearted but dim police detective, team up to solve the most baffling mysteries! A thrilling detective story for a new generation from Akira Amano, creator of "Reborn!" and "Ēldlive"!

(Source: MANGA Plus)