Fall in Love with my Unknown Wife

Noah is allergic to women, and his mother is pushing him to marry. He gets drunk one night and registers a marriage to a woman he cannot afterwards describe, and she cannot describe him either. The next morning he leaves the country. She stays and works to pay for her mother's medical treatment. A year later he is back and they meet at the office, where she is working as a cleaner and not using her real name. He finds his allergy does not affect him around her, and asks her to be his girlfriend under a contract, partly to spite the marriage he is trying to get out of. They grow close while each of them is still trying to escape a spouse. His mother arranges a meeting for him with the wife he has never seen.