Damasare, Korosareta Ore wa, Kaiki Shite Kyuuteki no Ani no Sanbou to Naru.

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.