I can't think of any other novel except for The Counterattack Plan of A Villain With Ten Thousand Fans if this isn't it I suggest searching up the novel with the tag Cannibalism and adding other tags that you might remember.
https://www.novelupdates.com/series/how-many-tomorrows-there-are/ In one of the chapters the MC had to cook whatever the werewolf wanted and the werewolf wanted to eat his meat
Is it a continuous thing where his flesh grows back and he cuts himself up to eat again? I'm pretty sure some author has written such a thing, even if it doesn't make any sense from an energy standpoint since it'd be a net loss.
i had a feeling it was this one since this was the only mature and psychological novel i read. thanks~~