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This song is the result of a special episode of Mecha-Mecha Iketeru!, in which fifteen members of AKB48 participated in a surprise end-of-term exam to determine the “Center Baka” (センターバカ; Idiot Center). The seven members who ranked in the lower half of the class were named the “Baka 7″ (バカ7; Seven Idiots), with Kawaei Rina becoming the “Center Baka” for placing last. The title of the song comes from “Hasute to wasute ga nakayoku tsukutta” (ハステとワステが仲良く作った; “Haste and Waste made friends”), which was Kawaei’s answer for translating “Haste makes waste” into Japanese. Listed in parentheses are each member’s test rankings.