A poor boy awakens a weak superpower and vows to protect his "ordinary" younger brother to the death, but he doesn't know that his younger brother is actually a hidden boss with the power of "law of cause and effect". The two are forced to be involved in a cosmic conspiracy, uncover the mystery of their origins while escaping through the stars, and use their flesh and blood to ignite the eternal spark that protects each other.
Purpose: Use the protective will deep in human nature to ignite the eternal spark that tears through the darkness