On a more serious note, it has great character-driven comedy and genuine pathos. If you like it, the ending will leave you as depressingly sad and nostalgically happy as the last Calvin and Hobbes strip. At first it's a funny enough 4-panel manga, but before you know it, the girls are growing up before you and they're graduating and you realize it's time to say goodbye. It's like going through high school all over again, but without the bad parts.