Yasha Ou no Saiai: Shiitagerareta Chiyu no Otome wa Dekiai Sareru

Mei comes from a family that hunts dangerous creatures, but she lacks the ability to perform exorcisms and grew up in an emotionally distant household. Her younger brother, who is proud and reckless, breaks a forbidden rule and unleashes Ryouga, a ruler from another realm. Left behind as chaos ensues, Mei faces danger. Ryouga, contrary to expectations, is kind, smart, and attractive. He helps Mei recognize her unique healing ability and proposes that she accompany him as his princess.