Denji has decided that his new dream is "to fondle some boobs." His partner, Power, offers to let him feel her boobs if he rescues her pet cat Meowy from a devil. With his dream in sight, Denji is all fired up and ready to go, until -
16-year-old Denji has been burdened with a massive debt left behind by his deceased father. To repay the debt, he works as a Devil Hunter with Pochita, the dog-resembling Chainsaw Devil.
After a fierce battle, Denji defeats the Bat Devil and rescues Power even after she had trapped him. He says it is all for the sake of "touching Power's boobs". Power mocks his ridiculous motivation saying "that's a pretty dumb reason", but still agrees to let him fondle her boobs. As Denji gets thrilled with the idea, he faces a sudden attack from out of nowhere.