After transmigrating to ancient times, Nan Xing was tasked with winning over a down-and-out prince. He was supposed to encourage and support him, help him return to the palace, and secure the position of crown prince. The System only said to win him over; it never specified how. So Nan Xing simply stole the man's heart. Living outside the palace, the prince was difficult and constantly complained. To give him a better life, Shen Cheng'an rose all the way to the position of crown prince. But on the very day he received the imperial decree, Nan Xing downed a cup of poisoned wine and kicked the bucket.
Nan Xing completed the mission and happily waited to return to his own world, only for the male lead to turn evil and the small world to collapse. Now he had to go back and save it.
No need to panic. He'd return with a new secret identity and win the prince over all over again. Last time he was poisoned to death, so surely dying a normal death this time would work.
But why had he transmigrated back again?
I like it very much. It's very appetizing. My sweet pet died of illness.