In Naruto: Reborn With Talent - Chapter 1 - Ch1. Awakening

Yuan Xiao was reborn. Only after her death did she discover that she was living in a book. In the book, she was a fake heiress who did terrible things and made the real female protagonist look like a good person. After being reborn, Yuan Xiao decided to become a scholar. As long as she studied hard enough, she’d repeatedly get the opportunity to draw prizes and stop herself from being controlled by the storyline. She wanted to change her life. Yuan Xiao did not want the terrible fate of her past life to repeat itself.

She wanted a life that belonged to her! Other students looked down on her. She made sure to win as many prizes in competitions as she could and consistently claimed the number one spot in school. Some people suspected she might have forged her educational accomplishments due to her young age. She directly solved the toughest questions in the world to prove those people wrong. Did somebody mock her for not being able to do anything else but study? She’d show them her world-class piano-playing…

Yuan Xiao went down the scholarly path and never looked back. She was no longer the bad student she used to be. The smart student in school, who nobody dared to offend, forced her into a corner and nervously gave her a lollipop. “I just gave you a lollipop, the thing that I like the most. When will you be my girlfriend?” Yuan Xiao tapped on his chin and chuckled. “I’ll be your girlfriend if you get into Q College with me.”

I, Hyoudou Issei, am a 2nd Year High school student and my age is equal to the number of years I haven’t had a girlfriend. And, someone like me got a girlfriend! I’m sorry buddies, I will walk the path of becoming an adult before you guys! – That’s how it was supposed to be, but why did I get killed by my girlfriend!? I still haven’t done anything yet! Are there no Gods in this World!? And, the person who saved me is the most beautiful girl in my school, Rias Gremory-senpai. I learned the shocking truth from her who isn’t a God but a Devil. “You have reincarnated as a Devil! Work for me!” Lured by Senpai’s breasts and treats, my life as a reincarnated Devil began. So the “Academy×Love Comedy×Battle Fantasy” starts here with just aggressive and worldly desires!

After a night, surprisingly I acquired a husband!

Well, the fact is that after a one-night stand, I unwittingly signed a marriage agreement.

There isn’t a bad in-law relationship but instead a mother-in-law and daughter-in-law alliance.

The purpose of our alliance: Make my husband interested in women!

Frankly speaking, a man who isn’t interested in a woman … is he gay? Having a husband who is suspected to be a gay, I will fight for him and not let him go astray.

So I raise my eyebrows and with a wicked smile: My dear husband, wait and see how I am going to teach you to be a real man!

- Description from Novelupdates

____this story sets in Japan that developed a little different history from yours.

This is how a Japanese Princess relieves her stress of the day by using the latest VRMMORPG, and while playing the villain there, the first town turns into whirlpool of chaos, smashed the underground organization in one hand and went for a coup. It’s literally a playtime diary of a girl who is called as “Genocider-san”, “Roaming Last Boss”, “A different person plays the game”, “Raid Boss”, “Ruthless”, “Calamity”, and such by the players.