The Cursed Fate Divine Son-in-Law

My life is so hard it brings disaster to my whole family. My mother suffered a difficult labor when she gave birth to me, and I should never have been born. But my grandfather saved my life, taught me occult arts, and arranged an engagement to prolong my life. Once I married, I would be able to defy heaven and change my fate with those arts. But just as I was about to come of age, a letter breaking off the engagement arrived, forcing me to leave home. And while trying to uphold the engagement, I discovered that there was something strange about my fate!