Moon Spirits, Born Together

Twenty-one years ago, Prince Ning, the current emperor's uncle, secretly sent a newborn baby boy away from the prince's residence. He never expected to see the child again. Twenty-one years later, Prince Ning met the boy in an unbelievable way. The grown child never imagined he would reunite with his family under these circumstances, either.

P.S. This is definitely not a father-son story.