The Hero Returned from Another World Becomes the Strongest Assassin in a Cyberpunk World

Author not listed

There is no widely recognized official manga or light novel titled "The Hero Returned from Another World Becomes the Strongest Assassin in a Cyberpunk World", but it appears to blend tropes from popular series like The World's Finest Assassin Gets Reincarnated in Another World as an Aristocrat and reverse-isekai or cyberpunk fusion stories.