Ye Qingcheng, the second lady of the Prime Minister's Mansion of Nanxuan Kingdom.
Nan Xuanyu, the third prince of Nanxuan Kingdom.
After the two met by chance, Ye Qingcheng fell in love with him and wouldn't leave.
Later, when Nan Xuanyu was in trouble, Qingcheng lent her body to the demon as a host in exchange for Nan Xuanyu's safety.
Nan Xuanyu resolutely left the girl who turned into a monster for herself.
But then he found out.
He has inevitably developed feelings for this little follower who is pestering him.
But she is no longer the simple Qingcheng...