Akuyaku Reijou wa Iya na node, Imushitsu Joshu ni Narimashita.

"I was a villainess…" One day, Layla Vivienne woke up and remembered that she was a Japanese person in her previous life and is now a rival character inside a romance game. In that game, Layla Vivienne had been engaged to the crown prince, one of the romance options. She didn't bully the heroine, but she was an unlucky character who ended up dying in every route except her older brother's. She wanted to avoid dying, so she came up with the idea of avoiding entering the magic academy where the game was set as a student. Layla chose to enter the academy as a doctor's assistant and tried to avoid both the romantic options and the heroine, but unfortunately… (Source: BisouBisou Comics)