I'll Devote Everything to the Crimson Magician

Graduated from being the second saintess, Loretta has her engagement broken off unceremoniously right after graduation.

Resolved not to rely on men anymore, she encounters the crimson magician Rush, who takes her in as his attendant. Yet, rather than light tasks, she’s pulled into serious magical work—and is soon joined by the crown prince who’s secretly a fan of saintesses. Together, the three form a strange alliance and end up tackling national crises, weaving romance, intrigue, and fantasy.