Denji is a teenager who lives his life as a Devil Hunter.

Aiming to pay off the debt he inherited from his father, he starts hunting devils for the yakuza with his buddy Pochita, a "Chainsaw Devil", while living a tragically poor life.

Just when things seem like they couldn't get any worse, Denji gets betrayed and killed by the yakuza. As Denji starts passing out, he hears someone calling from inside his head...
And I hate devil hunters, because you
 go around killing us devils.
وأكره صائدي الشّياطين، لأنّهم يقتلوننا نحن الشّياطين
Ich mag euch Teufelsjäger nicht.
Ihr tötet uns Teufel.
Odio a los devil hunters porque
nos asesinan a nosotros, los demonios.
Y odio a los devil hunters
porque os dedicáis a matarnos.
Je hais les chasseurs de démons,
vous tuez mes congénères.
Odio i Devil Hunter perché uccidono noi Diavoli.
Eu odeio caçadores porque
eles matam nós, demônios.
Охотников я не люблю за то,
что они вечно убивают нашего брата.