Isekai Maou to Shoukan Shoujo Dorei Majutsu - Volume 5 epilogue part1

Xiao Ze, who was dedicated to the people and vowed to become a generation of Ming Jun, accidentally fell on a little lady.
The little lady was born beautiful and lovable.
So Xiao Ze accepted his life and got the name of fear.

ps:
①The male protagonist has no concubine, and he is dedicated to serving the country.

- Description from novelbuddy

Ever since an NPC named Shu ChunChun, who had been taken advantage of and used carelessly by the world-hoppers, awakened her consciousness, she knew that the only way to drive out the world-hoppers was to make them fall for her, HARD.

- Description from Novelupdates

She was originally the young miss of the Marquis Estate, but became a peasant girl due to a mixed-up at birth.

Zhou Yu, a reclusive otaku who did not like to go out of his house, was one day forced out of his house by a series of unexpected events.