Medete Haru: Norowareta Koushaku Kishi-sama wa Dekiai suru

Haru Hanasato is a company employee with zero self-esteem and zero luck in love. Wishing desperately to meet someone truly special, she falls asleep holding a stone she bought from a fortune-teller—only to wake up in another world!? There, she meets Eld, a beautiful duke cursed by a witch, whose body is slowly being consumed by dark bruises as he awaits death. Confused and overwhelmed, Haru discovers that her soul possesses a rare healing power capable of cleansing Eld's curse. As Eld becomes drawn to Haru's gentle heart, he begins to shower her with overwhelming love and affection... (Source: Shogakukan, translated)