After the Dawn Rebellion, Char travels to Earth and meets a girl with mysterious powers named Lalah Sune.
　　Meanwhile, Amuro's father Tem Ray is working on the RX-78 development project. Learning of the defection of Doctor Minovsky, a key figure in Zeon mobile suit development, he heads for the moon. History's first battle between mobile suits unfolds in the twilight zone of the lunar surface.
　　Then comes Universal Century 0079. Side 3, the space city furthest from the Earth, launches a war of independence against the Earth Federation government under the name of the Principality of Zeon.
　　An era of violent upheaval begins, in which half of the total human population will be killed...

罗宾因自己冒失的行为搞砸了正义联盟的任务，之后他被送往少年泰坦。在那里达米安遇见了星火、野兽小字、蓝甲虫和乌鸦。而乌鸦神秘的身世竟然引发了一场危机。乌鸦的父亲恶魔三宫控制正义联盟并威胁要征服世界，少年泰坦必须面对这个危机。

CantheJusticeLeagueprevailagainstanunstoppableintergalacticmachinewiththepowertobendtimeitself!?Untilnow,theJusticeLeaguehastriumphedovereveryfoewhohaschallengedthem.Thistime,theyfaceBrainiac,asuper-intelligentinvulnerablemachinewhosemadquestendangersalllifeinthegalaxy.WhenBrainiaczapsSuperman,WonderWomanandGreenLanterntodifferentplacesintime,theraceisonforBatmanandTheFlashtore-assembletheJusticeLeague!

夏天时节，东府第一高校要举行合唱祭。在课后合唱训练中，高中二年级A班草壁光（神谷浩史 配音）发现同班的尖子生佐条利人（野岛健儿 配音）并没有开口唱歌。草壁原以为这样的优等生不屑于合唱活动，却在当天放学后发现佐条独自留在教室练习。鬼使神差地，擅长音律的草壁主动提出要帮助佐条练习唱歌。经过多日的相处，草壁渐渐被认真的佐条吸引，却一直苦恼于对方是为了他人才如此努力学习唱歌。到了合唱祭这一天，草壁忽然控制不住情绪，在正式演出中途跑了出去，佐条见状紧张地追上。在空荡荡的校园里，二人终于向对方确定了心意。夏天要结束了，而他们青春的诗篇才刚刚开始。                                    
                               　　《同级生》是A-1 Pictures制作的剧场版动画，改编自中村明日美子的同名漫画。