Great Teacher Onizuka began as a manga by Tohru Fujisawa in the late 1990s and became a popular anime series in 1999, centred on Eikichi Onizuka, a former delinquent who decides to become a teacher. Yoroshiku is a standard Japanese greeting used when meeting someone new, roughly meaning please treat me well, and Onizuka delivers it with his trademark bravado. Fans have reused the line in anime edits and soundboards as a shorthand for his chaotic but good-hearted teaching style, keeping the character recognisable years after the series first aired.