MTL - Quick Transmigration: Male Lead, You’re Overpowered? - Chapter 1 Mine clearance:

Yuka, reborn as the daughter of the universe's richest man, tries to live a simple life. She gets a big shock when she has to join Union University of the Alliance because of government rules.In university, Yuka picks an easy major, hoping to keep a low profile. But her plan doesn't work. She keeps facing tough situations that show off her smart mind and strong skills. Yuka tries hard to live normally but keeps getting pulled into extraordinary accidents.This is the story about how Yuka grows. It's about her trying to hide her real identity while dealing with a world that always challenges her.

The MC (Minato) is a college student who died in a plane crash and was reincarnated in a fantasy world. He was raised alone in the wilderness by his succubus mother, and now he tries to make his way as an adventurer.

The most famous deed of this princess was her words to her younger brother Liu Ziye.

When he became emperor, she told him, “Although your highness and I are of different sexes, we are the children of the same father. Why can you sleep with so many different women, while I must be only with my husband? This is so unfair!”

And after the Emperor Liu Ziye heard his elder sister’s words, he ridiculously thought it made sense. So he immediately corrected his “wrong ways” and painstakingly selected thirty handsome youths for her to enjoy.

Chu Yu awoke in the princess’s body and realized that she had obtained a male harem of three thousand; should she take just one to drink, or keep all of them?

- Description from Novelupdates

“My life as a demon… No. My life as human is really…”