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Tetsushi (a 5th grader delinquent who rules over the students of Jouin elementary), Ryouji(Tetsushi's right hand man) and Yuusuke (their sometimes-ally), are known to everyone in town as the "three evil prankster kings." In a creepy pharmacy located out-of-town, the boys meet an old man who bestows a strange and other-worldly power upon them. Soon after, our 3 young pranksters find themselves battling a variety of ghosts and demons...!? (Source: MU)