My Princess and Crown Prince Are Revived - Chapter 31 - He is the Big Brother of Those Years

Have you ever wished you exactly knew how to accomplish your dreams? Not feeling the slightest doubt anymore? Being aware at any time how every choice, action and decision of yours affects your future?

I got sucked into a novel full of villains and must tame them in order to survive!

The world that nurtured the civilization which reached the pinnacle of magic was on the verge of destruction.
The last survivor transmigrated to the past, when the magic civilization started growing, as countless mages were still fumbling their ways through the thorny paths of magic knowledge.
He, who came from the end of the magic era, aim to reach the pinnacle of magic.

- Description from Novelupdates

The strongest Demon Lord dies, and reincarnates as a human. Not only that, he because of various incidents turns into the hero’s best friend.

Follow his journey as he tries to help the hero escape his fate, and on the sideline to conquer the continent while he’s at it.