Watashi no Oshi wa Akuyaku Reijou.

The story of a reincarnated gamer pursuing her villainous lady love at a fantasy girls’ academy! Don’t miss the manga adaptation and spin-off light novel series, both also available from Seven Seas–or the anime!
Ordinary office worker Ohashi Rei wakes up in the body of the protagonist of her favorite otome game, Revolution. To her delight, the first person to greet her is also her favorite character, Claire Francois—the main antagonist of the story! Now, Rei is determined to romance Claire instead of the game’s male leads. But how will her villainous ladylove react to this new courtship?!

[From Seven Seas Entertainment]