In a world where shadows harbor deadly secrets and gods revel in cruelty, Haruto Takahashi's life takes a drastic turn the night his family is brutally murdered. Once a promising young man with a bright future, Haruto's existence becomes consumed by a thirst for vengeance. His parents, esteemed scientists working on classified research, fell victim to a powerful secret organization. Driven by grief and rage, Haruto sets out to uncover the truth behind their deaths.
However, his quest for justice is cut short when he is also killed in his pursuit of the truth. But fate has other plans. Haruto finds himself regressed to his ten-year-old self, bestowed with a mysterious system created by Mikaboshi, the god of chaos and cruelty. This system promises immense power but at a steep cost: failure to complete the assigned quests results in brutal punishment.
