At elite school Hakusenkan, most students strive to get into the Special A class (S.A) for the prestige and honour, Hikari's there because she wants to defeat her rival Kei Takishima, to whom she has played second fiddle since childhood. Having grown up in a homey bazaar, she's out of place in an elite school, but with the help of her zany classmates, she's living school-life to the full!