Futoshi Sajitashi was the the bodyguard of a crime syndicate. Where did he miss his footing in life?

In his youth of 17 years of age, he was involved in a rivalry and lost his life.

However, a world that he didn't know was there when he woke up. His memory was the same, but he was in a body of another man.

Though he was surprised, Futoshi was determined to live his new life in this world.