The Extra in a Terminal World

I possessed someone in the game my deceased brother left behind. Drowning. Electrocution. Falling to death. Poisoning. Excessive bleeding. … There are countless routes where the cursed hero dies, and I have to carefully raise him to prevent the destruction of the world. [The Wheel of Fate is turning.] [Please save the hero who will protect the world!] I’ll save the hero and return. [Reward: One wish.] To the past when my whole family was still alive.