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Ruby, a white Japanese hare, studied with her friends, especially with her classmate and roommate Kanon Mizushirou, they will face various hilarious situations and sometimes will gather to collaborate although they despise each other. Ruby and her friends will do anything to graduate and follow their dreams. The story involves also the love triangle both Ruby, Kanon and Mikage, Moreover, this feelings of both, which have to Mikage, will ensure that the hatred between Ruby and Kanon increases. The Plum Section of the 3rd grade class at the Sunshine Academy in Jewel Land are also known as "the Leftovers." Ruby and her classmates aim to graduate and follow their dreams.