Toaru Majutsu no Index: New Testament - Volume 12, Chapter 1: Steamed Buns and Diamonds — to_the_DIANOID.

The person whom the world revolves around.

A con-man and policewoman that are legends of their respective professions suddenly die, then are reincarnated and return to the Tang Dynasty of ancient China as little kids.

Accepting their second chance and forced restart, they choose to use the modern knowledge and specific talents that they have in their previous lives in order to live comfortably in this new life.

- Description from Novelupdates

She is an elder miss from a modern secret society family. She is very cold and heartless, but her appearance is very enchanting. She thinks of men as playthings. She was schemed against and her body was thrown into the sea.

When I came to, I had reincarnated along with the base fortress from my sci-fi game. What’s more, I was in the form of the female avatar I used in the game. All around me was an endless ocean, with no iron, no fuel, no energy, nothing at all! No matter how advanced sci-fi technology is, without resources, nothing can be made. Despite this, the natives use some sort of incomprehensible technology called magic, and there’s not a trace of science to be found. Most importantly, I want to eat proper meals for nourishment, not just survive on IV drips! This is the story of a TS girl surviving in a fantasy world together with a super-advanced but spoiled AI administrator.