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仮面ライダーフォーゼ
天之川学园高中来了一位理飞机头并穿短袍的奇怪转校生，他的名字是如月弦太朗，有着“和全校同学成为朋友”的远大目标。初到校的弦太朗结识了神秘少年歌星贤吾，并再次遇见青梅竹马城岛有希。 同一时刻，校园里出现了Zodiarts怪人。弦太朗于是借助从贤吾手中得来的Fourze Driver，变身成为假面骑士卌骑……以天之川学园高中为舞台，高中生英雄的战斗现正开幕
天之川高中的新学期开始了，歌星·贤吾正全力调查学校周边的异常能量。转校生如月弦太郎的出现掀起了新的波澜，他的目标是“和全校师生成为好朋友”，当然也包括贤吾……
贤吾向弦太郎透露，他必须将被启动的Zodiarts开关关掉，才能真正的消灭Zodiarts。一同在校园里搜寻Zodiarts开关的持有者时，悠木为弦太郎讲述了更多贤吾的故事，以及他手中Fourze驱动器和天文开关的来源
一年一度的女王选举即将来临, 弦太郎与风城美羽之间也再度出现摩擦。两人建立赌约，要想美羽成为弦太郎的朋友，除非本次选举中有人能夺走美羽的女王之位。弦太郎多次寻求帮助无果后，只得求助于悠木，让她参加选举，并在才艺比拼中战胜未尝一败的美羽。
在女王选举的过程中，弦太郎逐渐了解了美羽的想法，转而决定帮助美羽重夺女王桂冠。同时作为Fourze，他也要在变色龙Zodiarts的手中救出美羽
美羽强烈自荐加入了假面骑士部，JK对弦太郎大献殷勤。与此同时独角兽Zodiaets盯上了JK，弦太郎在战斗中使用了新的天文开关——10号电力开关，却无法控制其能量。
弦太郎发现JK只是在利用自己以从Zodiaets的手中保护他，并且还偷走了自己的电力开关。尽管了解了JK是个欺诈师，但弦太郎还是决定用友情的力量来改变他。
由于在对抗Zodiaets的过程中翘课过多，贤吾、悠木和弦太郎被强制参加周日的特别补习课程。大文字隼也出现在了周日特别补习课堂上，他对假面骑士部的厌恶不断增长，更因美羽也参与其中而更加愤恨。所有人都在补习中时，只能依靠美羽和JK来维持局面……
弦太郎等人继续追踪猎犬座Zodiarts，天蝎座Zordiarts的出现令他们陷入苦战，屡次缺席也令他们的补习惩罚再度升级。在美羽受伤之后，隼的内心受到了动摇，终于在弦太郎的努力下，吐露出了他内心的想法。隼下定了决心，他的人际交往和学园生活，将从这里开始改变。
野座间友子突然向假面骑士部的各位宣言：世界末日将要来临，而她将要成为月之魔女。当三名魔女带着友子在学校中接连引发超自然现象时，假面骑士部必须查明，这究竟真的是魔法，还是暗藏了Zodiarts的力量。
魔女力量的真相终于被揭开，而魔女结社向友子抛出了橄榄枝。是按下Zodiaets开关并利用其力量实现自己的梦想，还是帮助假面骑士部的各位消灭正在大闹学校的Zodiarts，友子最终的决定是什么？
Yuuki is targeted by a Zodiarts who is obsessed with her. Meanwhile, the locker which attaches the Rabbit Hatch to the school goes missing leaving Kengo trapped on the moon.
The Pyxis Zodiarts decides the only way to get revenge is to use his power to kill all the girls who rejected him, including Miu, by driving a bus with them all inside off of a bridge. Meanwhile, Kengo is still trapped in the rabbit Hatch.
Gentaro and the others decide to bring back those students who were Zodiarts to the school, starting with Toshiya Miura.
To save Miura from using a Zodiarts Switch again Gentaro must go up against one of the Horoscopes, Scorpion, a commander Zodiarts.
Yuuki is invited to join the Glee Club for a performance for the Kindergarten Class, however, her singing disrupts a fellow student in possession of a Zodiarts Switch.
The Perseus Zodiarts seems to be too powerful for Fourze to stop on his own, however, the appearance of the new Kamen Rider Meteor may change this battles ending...
After Kengo reaches a dead end in finding out the identity of the mysterious new Rider, Sonoda-sensei introduces new transfer student, Ryuusei Sakuta.
Ryuusei tries to gain membership to the Kamen Rider Club to further his own agenda but whilst most of the Club is fine with a new member, Gentaro is against Ryuusei joining...
Kengo has a fight with Gentaro due to his decision to let Ryusei for adjusting the Astroswitch.
Gentaro and Kengo must find a way to overcome their rift before a powerful Zodiarts defeats both Fourze and Meteor.
