The Melancholy of Haruhi Suzumiya is about the mundane life of a boy named Kyon as he runs into a an alien, a time traveler, an esper or two, and even a talking cat. Ever the optimist, Kyon doesn't let any of these mysterious characters ruin his sunny disposition. Even the attempted murder of him and his past self leave him unfazed. Despite all the trials, Kyon remains the series' cheerful narrator through two seasons and a movie. The official art and DVD covers all show the characters holding lemons. I have no idea why.