Thanks for Asking: I Use Three Kingdoms Kill to Assassinate

Even if you don't know the game of Legends of the Three Kingdoms, you can still enjoy this! (Invincible protagonist + power fantasy + fantasy + clever hero)

In his previous life, he was brave in battle and seemed capable of anything. He was on the verge of rising to the top, yet schemers framed him.

"If I can't have you, then I'll destroy you!"

By a twist of fate, though he died, his soul endured and time turned back! He warns his past self not to fall into the same trap again.

Behind everyone's seemingly charitable mask, they all have their own agendas!

You bring your Barrett, I'll bring my rocket launcher. We each do our own thing, and that's perfectly reasonable.