Roiro Urara's Ghost Marriage Theory

Zhen Jin is a woman who made a fortune as a jewelry craftsman. She was living a life filled with happiness as she was about to marry her kind-hearted fiancé. However, her beloved, who was to become her husband, died suddenly in a freak accident. Since then, unable to accept the truth, Jin has become devoted to psychics and religion, seeking advice from many people only to be deceived repeatedly in her desperate hope of seeing her fiancé again. One day, Jin is visited by a man named Roilo Urara, who claims to be a posthumous marriage consultant.

(Source: Comic Zenon, translated)