Countdown to the Fourth Death: The Cycle of Sin

[Death Reset + Rules-Based Horror + Suspense + Supernatural Mystery] On the fourth time I died, my sister's contamination level reached 100%. Red fog spread everywhere, and the monster my mother had become crashed through the front door. To save my sister, I signed a contract and became a walking "Sin Key." Rewinding after death is both my ability and my curse. The vengeful soul that betrays you in an elevator, the greedy old friend who comes to claim your life from inside a mirror, the echoes of abandonment that never fade from a hospital... I risk my life to clear one rules-based horror scenario after another, but the contamination marks on my sister's neck only grow darker. The Ghost-Hunting Bureau says I'm the only hope of destroying the "source of sin," with a 17.6% chance of success. Meanwhile, the cold "Dark Gray Mark" counts down in my mind. The fourth death will be the end, and the price. "Big brother," my dying sister suddenly smiled at me. "This time, let me save you."