A danmei novel.
The protagonist, Cheng Jingnian, transmigrates into the body of a little lion after an accident and meets the male lead, Gu Chuyan, the emperor's fourth son. Bullied as a child, Gu Chuyan finds Cheng Jingnian by his side, becoming an indispensable part of his life. They accompany each other through hardships and overcome them together. Cheng Jingnian then unexpectedly discovers that he can turn into a human. Gu Chuyan finds out during one of his transformations, and as they grow older, Gu Chuyan realizes he has fallen for Cheng Jingnian. Though others try to come between them, they ultimately end up happily together.
Theme: He eventually becomes the emperor's most treasured person.
What the author wrote is really interesting.