MIND ASSASSIN

Mind Assassin summary:

There was a man who was created during the carnage of WWII. He was an assassin engineered to psychically toy with people's minds and ultimately kill them. Kazu is the third generation descendant of that man, living in peaceful modern Japan, with a job as a clinical doctor. However, when the need arises, he uses his ability to help mentally disturbed patients overcome their pasts. But when something goes horribly wrong, he takes up the role his grandfather once had...