Please recommend a novel that described how the main character would turn into a monster?

It wasn't a sex change! I'm not a pervert… Alright. Back to the main topic… It was best for the protagonist to turn into a monster and stay by the heroine's side, and the heroine would not know. (I personally think that this is relatively rare...) However, it was fine if he didn't. As long as he could transform into a magical beast! I only like novels like this because I read "The Foreignland Pretender". I don't ask for much, but I ask for refinement. Don't copy, you can copy, but don't copy blindly when you see clearly. The last sentence: "It's best if you bring a brief introduction." Thank you, everyone!
I'm sorry everyone. I saw it. The tomato one is not bad. But I'm more eloquent. There are basically not many books that I can finish reading. I think I'll give it to the first floor. I hope everyone can answer my questions with a brief introduction.

Answer 1

I recommend the novel "The Lord of Magical Beasts". The main character loses his aptitude for cultivation and possesses a magical beast. He intends to make it the king of magical beasts and then cultivate his second primordial spirit to pursue the path of cultivation as a human. If you are interested in novels about raising pets, fighting monsters, and saving the world, this novel will definitely make you unable to stop. Come and read it together! I hope you like this fairy's recommendation. Muah ~😗