The betrayal was far too cruel. Kora Narumi, a loyal employee of the KB Group, dedicated his life to Ryusaburo Kurohane, the third son of the founding family. However, Kora eventually discovers that the tragic misfortune that struck his own family was orchestrated by none other than Ryusaburo himself. The moment he uncovers the truth, his life is brutally taken from him.

When he opens his eyes, he has regressed twenty-two years into the past, back to his ten-year-old self. Armed with knowledge of the future in this second life, Kora sets out to rewrite his destiny and protect his family at all costs. The curtain rises on an epic drama of revenge.