Well, the point-of-view approach isn't new. Interactive titles have cornered the market on this angle, in this reviewer's opinion. But Devil's delivers a sturdy stroke-fest just the same.
Firstly, the director/performer is anonymous, enabling easier vicarious arousal. Too many productions currently have guys who won't shut up, ruining the moment. So we get to sit back and savor all the sex sounds we want. All these girls suck-up to the camera/viewer enthusiastically enough, with Victoria Sin's cum-coaxing efforts the most enjoyable. Some good gagging, anal and the girls always get the guys off with their hands, so no self-stroking. Unfortunately the girls incessantly faking orgasms gets annoying.