Description:

Raul who had defeated the demon king as the strongest hero should have become the savior of the world. Having his treasured companions and family killed by power hungry aristocrats, he was executed with false charges brought against him by the princess. Just before his life collapsed, at last his heart fell into darkness. "...I will tear those traitors from limb to limb. Burn them at the stake. Sever them to pieces. Skewer them. I will kill every one of those bastards without mercy and make them taste hell.....!!!" Obtaining the power of darkness, Raul was revived. Sneering, he vowed revenge. “Oh, I’m looking forward to it – I'll bask in their blood to my heart's content.” Several days after the hero's revival, in the imperial capital where flowers bloomed in profusion, the parade that would advance towards tragedy began. (Source: MU)

Description:

"Maou Army’s strongest magician" I'm called. Ike, a demon capable of capturing a fort alone. Clearing away enemies with immense magic, he is without a doubt a monster awed by friend and foe. However he has a secret he can’t tell other demons. "I, actually I'm human you know." Using modern knowledge to keep his secret, he became treated as a great commander and the driving force of the Maou's army. (Source: MU)

Description:

The Sage Dwight, he along with the Hero defeated the Demon Lord who sank the world into darkness.However, they were falsely accused of becoming the next Demon Lords because of his power, and were thrown to The Valley of the Dead to die.......But though his flesh has rotten away, he lives on as a skeleton because of his grudge against the world. Dwight has vowed to deny that wrong world, and with a power that surpasses even the Demon King of the past, and also leading countless Skeletons he's going to start an all out war...!(Source: Mangadex)

Description:

Leo, the strongest hero who has no place to go anywhere after saving the world. Power that is too strong can not enter the peaceful world. A place of employment where he arrived – the former enemy, the Magus army! Source: MU

Description:

Soon after the last Demon King was defeated, the Demon Empire started a contest to choose the next Demon King. But the favourite contestant to win the tournament was no other than a human, The Hero Helck, whose motive to become the Demon King was to defeat his own race. What are Helck's true motives to participate in the contest and defeat the human kingdom? It's up to one of the Four Heavenly Kings of the Empire, Red Vamirio, to discover and unfold Helck's true intentions.