Rejected When I Proposed, I Can No Longer Hide That I’m a Corpse Retriever

My family has made its living retrieving corpses for generations. I was born with a rare boy's fate said to come once in a hundred years, and I wouldn't live past six. To save me, my grandfather arranged an engagement to extend my life. Sixteen years later, I went to ask for my bride's hand, but they refused. They thought the matter would be over once my grandfather died, but they had no idea that retribution was just around the corner...