I recommend the two novels,"The Cultivation of the Fat Otaku in the End of the World" and "Becoming Stronger by Searching Corpse". Although the title and the content of the question did not completely match, both novels contained the relationship between humans and corpses or beasts. The male protagonist of "Apocalyptic Fat Otaku Cultivation", Mu Qianxi, had some interaction with a strange and cute creature. On the other hand, the main character of "Start to Get Stronger from Corpse Touching" could control millions of zombies and tens of millions of pets, and had a certain degree of connection with all kinds of creatures. I hope you like this fairy's recommendation. Muah ~😗