The 13th Class: Curse of the witch
When the Witches appeared, humanity’s days of peace had ended.
When catastrophic entities known as Witches appeared, they brought with them the destruction of humanity. The Witches created demons which pushed humanity to the brink of extinction. Humanity, which had thirty continents, was reduced to only seven; the rest were occupied by the demons.
However, humanity wasn't completely hopeless. A man discovered Qi, a power which granted him superhuman abilities. The man gave birth to twelve children to pass down his Qi. These children each had unique abilities known as Classes; each child had a Class:
Swordsman, Berserker, Mage, Archer, Scientist, Watcher, Protector, Enforcer, Villain, King, Hero, and Servant.
With this, humanity had a fighting chance in the war with demons.
Growing up in the slums, Leonard was despised by the common folk, as he was the last member of a family that betrayed the Servant Class. Leonard lived his days under constant discrimination and hate over crimes he didn't commit. However, after an unfortunate incident, he meets a mysterious lady claiming to be the Witch of Time.