First ideas for short film - Charlotte and Josh

For our short film we want to mix two genres - experimental and social realism, as we feel this would make our film interesting and unique.
The general story of the film is a teenage boy that is infatuated with a girl his age - so much so he has photos of her all over his walls and is only really happy when he is dreaming about her. We want to include several 'dream' sequences throughout our film showing the boys secret thoughts and fantasies about the girl.

We want our film to open with a dream sequence of the girl in an ethereal setting, with soft-focus, perhaps dancing and spinning in a field with high key lighting to emphasise the ambient dreamy quality, the advert below gives an idea of what we are going to try and achieve;

The scene then cuts to the boy lying in bed, clearly showing that these scenes are just figments of his imagination. We want the rest of the film to be quite drab in colour and mise en scene to contrast greatly to the colourful, dreamy aesthetics of the sequences in his mind, to show his happiness when he is thinking of her compared to the boring life he lives in reality. The video below of the successful short film 'Black Hole' shows the drab, boring quality we will be trying to portray;