Introduction:
After surviving an accident, he wakes up to find himself in a strange place. A black-winged angel pointed to a large, pitch-black staircase and told him that only by climbing up these steps would the soul-immortal have a chance of resurrection. This is obviously not an easy task. The protagonist faces many difficulties and unknown challenges, and he must overcome various obstacles in order to find his way to rebirth. In the process, he will meet a variety of characters and gradually uncover the truth of the story hidden behind it.
