https://mangadec.com/imgs?src=/publish/manga-info?editId=685325c272fa8065708f8878,https://mangadec.com/imgs?src=/media/mpim/739/7393389376f3034efcc54bd0c2ee0608430c75bb_284_426_9272.webp,https://mangadec.com/imgs?src=1750279618317,https://mangadec.com/imgs?src=1750279633736,https://mangadec.com/imgs?src=Gunnou Kyoushitsu,https://mangadec.com/imgs?src=群脳教室,https://mangadec.com/imgs?src=Kenji Ichima,https://mangadec.com/imgs?src=shounen,https://mangadec.com/imgs?src=manga,https://mangadec.com/imgs?src=sci_fi,https://mangadec.com/imgs?src=school_life,https://mangadec.com/imgs?src=horror,https://mangadec.com/imgs?src=aliens,https://mangadec.com/imgs?src=mystery,https://mangadec.com/imgs?src=ongoing,https://mangadec.com/imgs?src=d000,https://mangadec.com/imgs?src=34,https://mangadec.com/imgs?src=class-of-brains,https://mangadec.com/imgs?src=2025,https://mangadec.com/imgs?src=rtl,https://mangadec.com/imgs?src=All of his classmates,https://mangadec.com/imgs?src= including his best friend and his crush,https://mangadec.com/imgs?src= have been reduced to nothing more than brains. An alien who calls herself A-sensei informs the protagonist,https://mangadec.com/imgs?src= Satoki Tsutsuno,https://mangadec.com/imgs?src= that to protect the earth,https://mangadec.com/imgs?src= they must use their collective brains. With Tsutsuno being the only one left in his class,https://mangadec.com/imgs?src= what trials await him and his classmates...? A shocking and suspenseful story of collective brain warfare brought to you by JUMP’S most creative 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