SA: The Years Have Not Yet Grown Old

There are people in this world whom you may encounter on the verge of death, if your obsession is strong enough. "If you give me the thing that matters most to you in all your life, I can make your deepest wish come true." An obsession you cannot let go of, even in death. In exchange for the thing you hold most dear, they will grant you one wish. Are you willing? A note before you read: 1. This story has multiple protagonists. 2. The author has no chapters written ahead and tends to post as they go.