Gongjakseongui Jeojubadeun Sinyeonim

When Serenity Theophano rescues an elderly man on the streets, she is inflicted with a deadly curse, solvable only in a limited time. Desperate, she delves into books for a cure until she encounters the cold Duke Aaron Lorang, after which the curse's brand miraculously disappears! Forced to remain close to the duke as an attendant, Serenity navigates his deep mistrust and suspicion of her. Initially planning to use him to escape her curse, she unexpectedly becomes entangled in a new predicament—the duke's growing obsession with her. With time running out, can Serenity untangle the curse binding her fate? (Source: Tappytoon)