I, the Fortune Teller, Declare at the Beginning That I Am Doomed

I tell fortunes very accurately. Accurate enough to calculate his own death date. There are seven scars on the left wrist, each one is a countdown. If you tell a fortune, you will lose three years of your life. Grandpa blocked the curse for me, but the price was that he would never be able to appear in front of me. But God's punishment is not the most terrible thing - the terrible thing is that God's punishment is myself. They call me Gu King. But I don't want to be a king, I just want to live.