The Beginning After the End, Vol. 1 (comic)

King Grey is unrivaled throughout the land in terms of strength, wealth, and prestige. However, underneath the glamour lies a deep solitude, so when he's reincarnated as Arthur Leywin, he resolves to not squander this second chance at life and live every day to the fullest-but the peace of this new world hides something sinister that threatens to destroy all he's worked for...