Akuyaku Tensei Dakedo Doushite Kou Natta.

Eliza Kaldia once managed to transform into a very noble young villainess in a fantasy otome game. She was stuck in this virtual world, which seemed far from her idea of how well-bred ladies should live, since the fateful events of the game were still far away while she was still a child. Firstly, many people did not even think that she would be able to live up to the school setting of the game. Due to the drastic changes in the situation in the neighboring state, which never appeared in the real universe, the world became completely different from the sweet school life from the game. It was such a harsh world in which even very young and beautiful girls had to take up arms. How it happened, no one knows. The main character has no magic or cheating skills. However, her filigree sense of ethics could be slightly distorted because of the reincarnation.