The story takes place in "chaos; A year and a half after the first "Shibuya collapse" incident, the stage changed from Shibuya again.

The gate of Destiny Stone moved to Akihabara. Okabe Rintarou, the hero, is a college student suffering from serious secondary diseases. He often fantasizes about his great responsibility and calls himself a "mad mad scientist"? Phoenix College is fierce and true, but in the final analysis, all it does is to develop strange and unrealistic things with two partners of "Future Props Research Institute".