Long ago, there existed a prestigious institution known as "Ryuuguu Elementary School," which produced many masterpiece characters. One day, an ordinary boy named Meisaku Matsuda enrolled there. He had no idea that this place of learning was populated by eccentric individuals such as Sweets, an energetic fool; Musubi, a rice ball who becomes angry when referred to as "onigiri"; Nokio, a narcissistic self-proclaimed robot; and Bolt, who is clearly faster than a rabbit. Surrounded by such unique characters, will Meisaku be able to graduate as a splendid masterpiece character?