I lived my life honestly, doing my best to help others. But instead of being rewarded, my life was a constant cycle of misfortune and unfair misunderstandings...

After a tragic death, I, Kuroda Issei, was told a shocking truth as a soul. Due to a system error, my good deeds were inverted; the harder I worked, the more "unbeatable negative karma" I accumulated. To avoid Hell, I was reincarnated into the body of the "Black Mage," a figure feared throughout a magical world. Even worse, my new ability is a cruel irony, I can only gain luck by performing "good deeds."

Despite looking like the ultimate villain, I face a paradox,I must do "good" just to survive. Determined to find my mother and return to Earth, I enlist the help of a female mage to lead the forces of evil and begin a grand reversal of fate.

The curtain rises on an "Anti-Hero" fantasy where a man burdened with the worst karma must save the world!