The Lonely Shadow Boy

My name is Long Xiyi, and I am eighteen years old. From a young age, I was overlooked by my family. Once, I overheard the elders in my family saying that I was some kind of cursed birth, doomed not to live past twenty. Despite this, I have steadfastly faced my imminent fate. In my eighteenth year, everything changed drastically in an instant, and I felt as though I had fallen into a dark and endless abyss! A cat-headed humanoid with nine lives, a spirit corpse crawling out of a white coffin, and a ghost child who always calls me "Blood Soul Brother"...
My mysteriously disappearing family members-are all these things fated or orchestrated by someone?