Luo Xiu has finally become a Dragon Knight. Just as he's about to begin the harem life he's always dreamed of, he suddenly awakens the Divine Twin Constitution and is chosen as a Saintess. Not only does his harem dream fall apart, even the hope of losing his virginity becomes a pipe dream.
To get a girlfriend, he has to retire as a Saintess: give birth to a child in the body of a Saintess and raise the next generation of Saintesses.
You want me to give birth? Why don't you do it yourselves?
And so the Saintess runs away.
On his hundredth escape attempt, Luo Xiu finally reaches the neutral Free City, where he meets Bai Xiaotao, who falls in love with him at first sight. She's also a devoted fan of his other identity, the current Saintess Luo Li. While working as Bai Xiaotao's bodyguard, he hides his identity and becomes her best friend.
After that come the lolita's dad, the socially anxious werewolf girl, the cross-dressing vampire, the musclebound girl who calls him her bro, his fun-loving little sister...
One problem child after another shows up at his side, and Luo Xiu/Luo Li finally gets to enjoy the harem life everyone envies (or so they mistakenly think).
Then why does he keep sighing in despair?
(The harem is currently planned to have just three girls. There's a lot of male POV early on, and the story takes a while to heat up.)