御宅英雄、无政府状态和蓝色从超级黑客尼克那里得到了粉红佳人下落的线索。该小组前往平克的藏身处，试图让她与他们联合起来。

在Pink的加入下，三个魔法女孩现在团聚了。当Otaku Hero和女孩们在秋叶原的一家女仆咖啡馆举行集会时，SSC的四天王之一发射了一个巨大的机器人，在战斗中面对他们。Unit-@对宅男的仇恨背后是什么？

御宅英雄在神田河失去了一个心爱的玩具机器人后，他和女孩们遇到了满成桥御宅公社充满敌意的中年成员。两代人为了争夺御宅族文化的真正定义而展开了一场较量。

御宅族英雄带着涩谷敌后的女孩，用一种放大魔力的药物寻找一名老年收藏家。收藏家同意提供这种药物，以换取被锁在中野Sunplaza SSC基地中的稀有雕像。

与“御宅英雄”和中野的女孩们一起，SSC向秋叶解放区发动了进攻。其他御宅族奋力保卫他们的基地。在返回秋叶的路上，Otaku Hero回忆起他与魔法女孩的过去，以及他与Shobon的第一次相遇。

On their way back to Akiba, Otaku Hero and the girls are confronted by two of SSC’s Four Heavenly Kings—Adam and Eve. They get trapped in a cyberspace where Otaku Hero and Anarchy must defend against relentless attacks and cheats to rescue Blue and Pink.

Otaku Hero, Nick, and the other otakus get together to discuss the planning for the upcoming Wanku event. From merch, to guests, and even a possible physical media release, it's all on the shoulders of the appointed lead producer, Otaku Hero.

SSC forces attack the otaku at the Wanku! event with an army led by two of the Four Heavenly Kings—the silent Himawari and her overbearing older brother. Pink and Blue have to take the power-up drugs from Chogo-shi to defend against the deadly siblings.

With the thought of Anarchy's return casting a shadow over the otaku army, Otaku Hero rallies the troops and prepares for one final battle. Otaku Hero leads a direct attack on SSC headquarters while the magical girls stay to defend Akiba from Slayer.

The notebook that Otaku Hero found in the SSC base explains the origin of Shobon's hatred for otaku and foreshadows a dangerous fate for the magical girls. Running through the empty streets of Tokyo, Otaku Hero races back to try to change the script.

Once Slayer's blood transforms the magical girls into Magical Destroyers, Shobon moves his story toward its planned climax. There is little Otaku Hero can do to resist. What will be the fate of the otaku army and otaku culture in SSC's planned New World?