* CompleteMonster: [[NotSoWellIntentionedExtremist Igaya]] is the chairman of an educational project that takes rebellious teenagers--specifically 15-year-olds--to a virtual replica of Shibuya, where they are made to believe that they are rival street gangsters fighting in a [[MobWar turf war]], leading to them beating and even killing each other while Igaya terrorizes the district with a security program that assumes the form of an unstoppable SerialKiller named Piece, using him to brutally kill those who break the laws of his world before respawning the victims and giving them brand new memories to repeat the entire process again. Despite putting up the façade of a respectable and professional man trying to [[TheLudovicoTechnique recondition his students into better members of society]], Igaya is secretly a PsychopathicManchild himself; lording over his "precious" Shibuya; trying to punish the protagonists for helping their classmates escape out of sheer spite; and is all but stated to have murdered the original developer of Shibuya in the real world when he got in his way.
* ViewerGenderConfusion: Tsuyoshi is a boy played by an androgynous female actress.
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