Siheyuan: I Was Reborn as a Cat

Feel-good story + System + a fantasy world in the later parts. After an accident, Xiao Yan discovers that he has been reborn in the world of the Siheyuan, and has even turned into a cat. He also awakens a mysterious System. To trigger quests, complete them, evolve, and become human, Xiao Yan becomes the nightmare of all the scheming residents of the courtyard. In order to repair the System's damaged core mechanism, he experiences a series of supernatural events and eventually evolves into a Devourer. Just as he transmigrates back, another sudden change occurs, and Xiao Yan finds himself in a fantastical world, where he embarks on a grand and eventful life before setting out on another journey home.