Kill Ao 2nd Season is the second TV season of Kill Ao, an action comedy. The earlier entry, Kill Blue, introduced Juuzou Oogami, a legendary hitman who had never failed a job until a strange wasp sting left him in the body of a 13-year-old boy. In that season, his boss sent him to infiltrate a middle school, where he faced energetic classmates, schoolyard chaos and rival assassins, all while wondering whether he could ever get his adult body back.