Akuyaku Tensei Dakedo Doushite Kou Natta.

A girl who was reborn as a noble villainess in a fantasy romance game finds herself in a world that does not match her expectations. The game's major events have not yet occurred, and she is still a child. She is uncertain if she will survive long enough to reach the school setting featured in the game. Unforeseen changes in a neighboring country, not present in the original game, have altered the world significantly, making it far from the idealized school life depicted. In this new reality, even young girls must take up arms. She questions why things have turned out this way. She does not possess any special abilities or magical powers. Her moral compass may have shifted after her reincarnation.