The rapper, who directs under his real name Ben Drew, suggests that the film paints a realistic and grim portrait of gang culture in London.
"I'm not trying to glorify [gang members]," Drew told The Evening Standard.
"This film says, 'This is the reality of it'. It's not a fairytale, you're not going to go on some f**ked-up adventure and come out the other end. It's not glamorous, it's not romantic, it's f**king dark and disgusting."
The film stars Riz Ahmed, Nathalie Press and Dannielle Brent alongside a cast of first-time actors from the Forest Gate area of London, where Drew grew up.
Six interlinking short stories make up the film's narrative, each one represented by a different rap song which offers commentary on the characters' lives and actions.
He went on: "People hopefully will get some understanding by watching it and see that there is a reason behind every despicable crime that happens.
"It's not just some mindless thug taking their anger out on someone. It usually stems from some really deep-seated, f**ked-up places."
Critics have already described the film as harrowing and "frequently horrific".
The soundtrack foriLL Manors, featuring Drew's single of the same name, will be released on June 25.
Drew recently suggested that he wants to "destroy the music industry machine".
Watch Drew's interview with Digital Spy about the Ill Manors shoot below: