The romantic comedy genre, or rom-com if you like, is a difficult genre to sell. This is because, unlike practically any other type of film, the basic premise will be exactly the same between each romantic drama. The plot is always going to be the same. The two main characters are going to get together at the end of the film and everyone is going to live together happily ever after – or are they? This is why I love (500) Days of Summer. It's different. This is not a love story, this is a story about love as the tag line tells us.