Death March kara Hajimaru Isekai Kyusoukyoku (WN) - Book 5 - 5-6. The Rat Princess

After spending half a year in the province, Cheng Yang took a luxurious cruise for seven days.
Accidentally hooked up with a CEO on the way.

Later, Cheng Yang found out that he was pregnant.
Just as Cheng Yang was preparing to secretly give birth to the baby, it was a coincidence that he fell asleep in the big president’s bed.

It’s impossible to run with the ball, his man is handsome and rich.
Must cling tightly and can’t be torn down.

- Description from Novelupdates

This book narrates the joyful cultivation tale of an ordinary commonplace university student and a cute and coquettish little fox.

I drew a lottery at the Shopping District and won the privilege to go to another world. After drawing a lot of balls, unexpectedly I got a cheat-like skill. Silencing those who are noisy and getting hold of all the things that I want. I will satisfy all my desires.

He became a teacher at the best magic academy in the empire.
….For being mistaken for someone else.