Tensei Oujo to Tensai Reijou no Mahou Kakumei

Synopsis

Arriving on the battlefield, Anisphia and Euphyllia aid the adventurers and knights in fighting off a stampede caused by monsters fleeing the dragon. Increasing her strength with a magical medicine she developed, the princess fights her way through the horde to the dragon and faces it in mid-air with her magic broom. However, the creature protects itself from her gadgets with a magical barrier and shoots her down with a breath attack. Fortunately, Euphyllia saves her. While Euphyllia begs her to flee, Anisphia believes that she has to defeat the dragon to be a "magician", causing the young lady to change her mind and help the princess. Taking on the dragon together, they managed to pierce its barrier and defeat it by cutting right through its breath attack using a magic sword. Following its defeat, the dragon telepathically congratulates Anisphia before "cursing" her by seemingly transferring its own soul into her. Afterward, Anisphia and Euphyllia attend a victory party but the princess struggles to fit in while the young lady finds herself uncomfortable around men following the engagement cancelation incident, prompting them to instead dance with each other outside on the balcony.

(Source: Wikipedia)