This world is dead - the old way of heaven has decayed and collapsed, the laws have collapsed, and weirdness has grown. You, an otherworldly soul, are forced to take over the corpse of a god. The power is as small as a firefly, but it has to pretend to be the sun.
Your only way to survive is to use "missions" and "gifts" to weave lies and tame all living beings into your siblings and chess pieces. You grant opportunities, send down divine punishments, and direct a grand salvation drama behind the scenes.
As your power grows, an ultimate paradox emerges: when you finally accumulate enough "points" to become the true and selfless god of heaven - that "you" who is proficient in calculation, mastery of manipulation, and full of cause and effect, will you still be willing to eliminate yourself and become the perfect god you once pretended to be?