Special swimsuit-featured episode included in the fourth DVD/Blu-ray volume.

Togashi is born to run. As a kid, he is naturally gifted and wins every 100-meter race without effort. But in sixth grade, he meets Komiya, a transfer student who is full of determination but lacks technique. In teaching him, Togashi gives Komiya a new purpose: to win no matter what. Years pass by, Togashi and Komiya meet again as rivals on the track and reveal their true selves.

A few months after the events of Steins;Gate, Rintarou Okabe and his group of friends are invited to tag along with their acquaintance Faris NyanNyan, who is participating in a Rai-Net battle event in the United States. There, they meet up with an old colleague: Kurisu Makise, who has been recalling fragmented memories of events that happened in the other world lines in the form of dreams. She confronts Okabe, questioning him as to whether these events—particularly the incidents between the two of them—did indeed happen. [Written by MAL Rewrite]

Arashi Ishino is Japan's "Space invaders" champion. He must use his skills to beat others at different video games.