Half-demon, half-human, Louie Marcillen had lived peacefully with his mother in the Kingdom of Menfil until the Majin disease struck him. Physical changes, caused by this disease, led to persecution of Louie and rape and death of his mother. Powerful demon god Graza, the father of Louie, took care of him in his dungeon and tried to put out the Louie's fire of hatred towards humans. This was ended futile, as the dungeon was raided by human Heroes, slaughtering everyone on their way including his father.
Louie who was lucky enough to survive, made a vow to revenge humans for his parent's death.

As the demon's blood is burning in his veins, there are still memories of his human mother, her love and warmth.
Struggling with these contradictory feelings, Louie begins his journey towards the Menfil's capital.