You transmigrate into the book called “her and her dog” Its a book about a girl named Lilly Florence, who is reborn after dying in her first life and joining a company with a trillionaire Ryan langston, he is tall, handsome, has black hair, perfectly built like a greek god, who by day is a cold ruthless man and by night, he transforms into a dog. She knows this from her last life and adopts his dog form from a adoption centre and slowly makes him fall involve with her while she pretends to be a kind innocent girl while being a ruthless person when she is away from him. But you transmigrate into the book before she adopts his dog form.