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...
Flat on the ground looking up, 
no matter how it makes me feel
Ich kann nichts tun, nicht aufstehen,
mein Blick bleibt FLAT.
Chancelant les yeux embués
Le regard blasé
Mesmo estando lá, chorando ou não,
é uma perspectiva plana