A long time ago, there was a demon named Sparta who betrayed his compatriots and fought for mankind. He fought against the legions of the demon world alone, repelled the demon army, and successfully protected the human world. After that, he stayed in the human world for more than two thousand years. By some chance, he met Eva, a human woman, and the two fell in love. After getting married, Eva gave birth to twin brothers, the eldest son Virgil and the second son Dante. After their father lost contact and their mother was killed, the separated brothers grew up in hardships, but due to different experiences and ideals, they went on opposite paths... After a certain decisive battle, the brother fell into the devil world and lost all news. But the younger brother stayed in the human world, with the mission of hunting demons. As the years went by, countless demons killed him, and his name became more and more famous, gradually becoming a legend... He inherited his father's beliefs and became the new nightmare of the demons. Demons are wary, jealous, fearful, hostile, and even admirable towards demon hunters. Except for those who are ignorant, most of them remember the name "Dante".
One day, Dante received an invitation letter with a mysterious origin...
Concept: Even if the devil values friendship, he is also a devil