Hylen, the son of Duke Emmast.

At the age of ten, he discovered he was not of noble blood. Even after learning that his biological mother had swapped him with the duke's true son, he hated Gailont, the duke's actual heir.

However, the more he tried to hide the truth and eliminate Gailont, the deeper he fell into the abyss. It was only as he neared death that he admitted his wicked desires, closing his eyes in regret.

'That damn inferiority complex, what a fool Hylen was.'

When Hylen opened his eyes again, he had returned to the past, to the moment he was ten years old. The reborn Hylen abandoned his hatred and obsession for Gailont, deciding to one day give up his position as the duke's successor and live a new life. He then began to put his plan into motion, one step at a time...