Nonsense Revolution (2008)

After a night spent drinking and partying, a group of six best friends is torn apart when they accidentally kill their bisexual friend Kaz when he darts in front of their car. One year later, Kaz appears to Tess as an eternally-horny angel who only Tess can see. It's up to her to reunite the remaining five friends so Kaz can move on, but things don't always go according to plan.