Boku wa Maosama! (ボクは魔王さま!!)

The half-century-old magic seal was broken and the dark lord rose again. In an instant the world was shrouded in a rolling darkness, the land itself a barren wasteland under his tyranny.

As the dark lord conquered each unsuspecting kingdom, heroes were summoned and snuffed out one by one, none reaching the castle.
Finally, the heavens anointed a particular young hero.

Like those before him he made the journey, but this time, he was victorious. The dark lord was felled again. But… No one knew that the lord left behind a child.

Many more years passed in peace. The dark lord’s son grew, waiting… plotting… with a vengeful fury.