KōdoIkuseiSeniorHighSchool,aleadingprestigiousschoolwithstate-of-the-artfacilitieswherenearly100%ofstudentsgoontouniversityorfindemployment.Thestudentstherehavethefreedomtowearanyhairstyleandbringanypersonaleffectstheydesire.KōdoIkuseiisaparadise-likeschool,butthetruthisthatonlythemostsuperiorofstudentsreceivefavorabletreatment.TheprotagonistKiyotakaAyanokōjiisastudentofD-cla.s.s,whichiswheretheschooldumpsits“inferior”studentsinordertoridiculethem.Foracertainreason,Kiyotakawascarelessonhisentranceexamination,andwasputinD-cla.s.s.AftermeetingSuzuneHorikitaandKikyōKushida,twootherstudentsinhiscla.s.s,Kiyotaka’ssituationbeginstochange.