Let You Control the Beasts and You Feed Them Devil Fruits?

Chen Lan travels through a parallel world where everyone has the talent to control beasts and can contract with beast pets to fight. And his pet is just an F-level little monkey. Accidentally activated the system and was rewarded with a Shao Shao Fruit! This Devil Fruit can only be eaten by pets, not humans. [Evolution of F-level pet monkey - SSS-level World-Burning King Kong] As he levels up, he gets more and more Devil Fruits, and each one is fed to his pet. They have changed dramatically! [Sparrow + Frozen Fruit = Frost Phoenix] Freeze all things, and all creatures will wither! Any useless pet in his hands can turn into an extremely powerful and terrifying existence. It wasn't until later that he discovered that devil fruits were not the only ones that could be fed to pets. Even the Thousand Blades of the Demonic Sword can be used...