The Magical Revolution of the Reincarnated Princess and the Genius Young Lady, Vol. 2 (manga) — Piero Karasu

Some time off at the royal villa has helped Euphyllia get her thoughts together following the shock of her engagement being broken off, but that clarity has only made her aware of how empty her heart now is. She looks to Anisphia for answers, but the princess is too busy getting hyped for an impending monster stampede! All high-ranked adventurers have been summoned to stop it, including the one known as… the Marauder Princess!