MTL - Sword Among Us - ~ Fun Fools Day

For unknown reasons, he finds himself transported to a parallel world's Japan, unexpectedly taking over the body of a soon-to-be high school student who had died accidentally. Surprisingly, he did not inherit any memories. However, the first challenge he faces upon arriving here is a language barrier...Just as he struggles to communicate with his new family, a heavenly voice arrives: the black technology system has been activated, and the initial item—translation konjac—has been distributed.This is the story of someone with above-average intelligence but almost no physical strength in the Classroom of the Supreme Power.

Codename-Anastasia

The journey of a generation’s male empress started because of four words.

“Send a dowry escort.”

During the 19th year of Yuanqing, Qi Yunruo boarded a carriage and entered through a corner door of the second prince’s estate. Then, across the watery corridor, he gazed at the prince from afar.

Notes:

For aristocratic women in imperial China to marry into a family part of the upper nobility, they must be of the legitimate line and must also have an escort/dowry maid that married into that family. That escort would be a “ying” (媵) and could be considered a concubine.

- Description from Novelupdates

Omnipotent A-Grade Cool Female Lead VS Secret Passionate and Domineering Male Lead That Loves Assuming and is Easily Jealous