Tamotsu Denkigai is just another otaku, prowling the streets of Akihabara for elusive rare figurines and other treasures. However, the streets of Akihabara aren't what they used to be - pretty cosplayers are ripping each other's clothes off!

Tamotsu, Arisa and Niwaka visit Matome's hideout, where they discuss Tamotsu's new powers and the current state of Akihabara. What evil lurks in the streets of their favorite town?

Tamotsu finds a series of new hobbies, and being who he is, he runs off to pursue them. Meanwhile, Arisa, Niwaka and Matome go on patrol without him, and receive a type of attention that they did not expect.

Deadly radio waves send Akihabara to chaos. The team must employ classic radio technology to counter the threat.

During his "training session" in one of Akihabara's video game arcades, Tamotsu is confronted by a mysterious enemy who challenges him in a fighting game.