Logan McLain, a middle-aged knight fighting for the independence army, is intent on getting revenge against the empire which took over the kingdom and executed his brother when he ends up dying in battle. But when he wakes, he is a young man again, and has yet to be disowned for his terrible behavior.

Using his experience and knowledge from his past life, Logan recruits a few talented individuals to develop new weapons, build an army, and make enough money to fund it all.

But will he be able to make amends with his family and stop the empire's march?

After defeating the commander of the seventh Corps of the Demon King’s Army, ‘Tiny’ was about to die. However, in a desperate situation where the destruction of mankind can not be prevented, the last surviving comrade, ‘Sword Emperor’, uses the power of an heirloom to send Tiny back in the past.
Tiny, who has returned from being the strongest knight on the continent to an orphan in the slums, gains new powers that he did not possess in his previous life. Can Tiny, in this life, prevent the extinction of mankind?