In a modern-day loli's home, a super handsome ancient Jinyiwei falls from the sky! Without parental care, the loli takes him as her closest person and even wants to become his bride?! Though he appears tsundere, cold, and picky on the surface, he finds it harder and harder to let go of her...

Note: Jinyiwei ("embroidered military guard" in English) were secret police in China during the Ming dynasty (see Wikipedia for more).