Na to už existuje vhodný systém:
Tenra Bansho Zero is a "Hyper Japanese Fantasy RPG" purposefully designed by terrible Japanese wizards 12 15 years ago to be as egregiously over the top as possible. One part D&D, two parts Japanese dramatic theater, and a generous portion of everything good about all those ultra-violent and slightly pornographic anime VHS tapes Blockbuster never could seem to keep in stock; even by Japanese standards TBZ is "anime as fuck."
Some weeb finally translated it into English so us baka gaijin could thrust our clammy, undeserving hands into this rich, feudal arcanepunk hellscape of big titty babes with carnivorous dick-pets, hulked-out samurai mercs coming to steal your lunch money, an entire chapter of shameless X-Men refs, Native Americans (Oni) mercilessly hunted and slayed for their valuable scalps (still-beating hearts), and various other painfully Japanese cliches dragged kicking and screaming to their most absurd and illogical conclusions.
Technically, the game is a hot mess. Players throw handfuls of d6 for checks, points are awarded based on how cool everyone thinks you are, and you can invest those points indirectly or directly into improving your character. Threatening to kill yourself is a power-up, and killing yourself is always under your control. You can dodge 1 arrow or an innumerable cloud in the same roll. You can defeat your demons and find true peace, or you can be overcome by your Karma and go insane in a violent rage, forcing the PCs to reckon with a powered-up NPC version of you. You can fight the final big bad or fuck it. (Okay that's a house rule.)