https://www.novelupdates.com/series/akuyaku-reijou-wa-danna-sama-wo-yasesasetai/
Aka Toad of the Swamp, it's the novel described in the ad at the bottom of the page, FYI.
I'd say get him into therapy and then into a job with the system. But since his first instincts upon awareness was to manipulate people to death, maybe not.