Kurosagi Saikidou: 18-sai Shinseijin Sagi Hanzaihen

The 18- and 19-year-olds who have just become "new adults" are getting trapped in scam contracts. How will Kurosaki, the most dangerous con-artist in history who specializes in conning other scammers, fight back this time...!

(Source: Big Spirits Comics, translated)