Kimengumi Kaitai Zensho

This is the story of five students who make up a crazy and unique group (the gang of the funny faces) and, in an incredible twist of luck, they befriend the cutest girl in school. Of course, they will enter into competition with many groups in their school, where teachers are tricky and sometimes clueless, where they can still defy the laws of nature to win sports tournaments and where you can still be childish, Anything could happen in this high school. (Source: Anime News Network)

Contains extra stories published in the late 90s and early 2000s but only collected in 2004, including the long awaited chapters showing how the quintet first met and an extra interview with the original author, answering 30 questions