Lucky Star complete + OVA (rmvb, eng subs)

Lucky Star's story portrays the lives of several girls attending a Japanese high school named Ryōō with a very loose sense of humor. The setting is mainly based on the city of Kasukabe in Saitama Prefecture.[4] The main character is Konata Izumi, an athletic and intelligent, but also slightly mischievous and laid-back girl who, despite these attributes, is not in a sports club and has to resort to all-nighter cramming for tests. She would rather read manga and play video games than do her homework, which makes her a lazy character.

The serialization began with the four main characters in their first year of high school: Konata Izumi, Kagami Hiiragi, Tsukasa Hiiragi, and Miyuki Takara. As the story progresses, they move on to their second and third years. However, the anime starts the story with them beginning their second year, and the other high school girls that are seen in the opening are only introduced halfway through the series. The storyline usually includes numerous references to popular past and present manga and anime series.

source: wikipedia.org