The male protagonist Sang Huai is an excellent special police officer in modern times. During a mission, he accidentally entered the book "The King's Self-cultivation" and became "Sang Huai", the second son of Wei Guotaiwei who was frail and sick since he was only 10 years old. In the book, an "uninvited guest" came to the room that night. As a result, an imperial edict came from the palace the next day, asking him to quickly enter the palace and become the companion of another 15-year-old male protagonist, the prince Wei Yuyin. After going through all kinds of hardships, they finally fell in love.
Concept: True love does not only exist between opposite sexes