Keeper of Scarlet Petals

To be a Keeper is to dedicate one’s life – and heart – to protecting another. Jasmine wasn’t ready for it. Less than a year into her training at Sanctuary, a college for Keepers and mages alike, all she wanted to do was continue mastering swordsmanship and avoid her other responsibilities. Those plans are ruined when she's assigned to be the protector of her biggest rival. He's cocky, smug, and drives her up a wall at every opportunity... and yet, Jasmine starts to find herself inexplicably drawn to him. Unfortunately, burgeoning romantic trouble is the least of Jasmine’s problems. As pieces of a malevolent plot start to unfold around them, she and her charge realize that there might be only one thing left that they can rely on. Each other.

Source: Naver Webtoon