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Ayumu Kasuga more commonly known as Osaka is a transfer student from Osaka JP. She is terrible at sports and has a friendship with Chiyo because of this. She also is close friends with Tomo and Kagura due to them all being part of the "Knuckleheads" who make awful grades in school. Osaka is often stuck in her own world and gets easily distracted.
Azumanga.nekoweb.org is merely a fan page for the 2002 animated series Azumanga Daioh...