After a chance encounter with Maho where they discover knowing someone in common, Okabe has his first face-to-face with her special AI, Amadeus.

Okabe and his friends must battle against fate in the past, present, and future to find Steins Gate and reunite the lab members once and for all.

A special day approaches during a lull in the chaos. It's that time of year to give chocolate to the ones you love, but not everyone finds that an easy task.

Unaired episode included with the volume 6 BD/DVD release of Steins;Gate 0.