Mind and memories of a human. Body and emotions of a monster.

Giving up on his future to avenge his sister's suicide, he kills those responsible for it. Being mortally wounded in the process, he dies just to be awakened in the unfamiliar world in the alien body. Feeling appetite for flesh and holding no empathy for living creatures, will he be able to stay true to his human sentiments when his whole existence is the Evil itself? But first, he needs to survive because in this foreign world his new form isn't welcomed, to say the least.

He will have many enemies in this foreign land. But the hardest fight is always the one against himself. For him, it would be both metaphorically and not so much...

Non-human MC? Check. Cat companion? Check. Original Power system? Check. A little (?) bit of madness? Check.