This series is set after the events depicted in Steins;Gate... but in a reality where Okabe failed to save Kurisu. He gives up his 'mad scientist' persona and stops investigating time travel. Then one day he meets Maho Hiyajo and Alexis Leskinen, acquaintances of Kurisu who have been working in the field of artificial intelligence; the system's personality is based on Kurisu's personality and memories. They ask him to help with the system's development. Gradually he is brought back into the field of time travel and it isn't long before tragedies start again and he must work again to save his friends, and the world.
Having really enjoyed the first series I was keen to watch this; I was not disappointed. Given how the story starts it isn't surprising that it has less comedy moments than the early part of the last series. The story was gripping from its opening to its conclusion. All the old characters are back, even if Kurisu is now a computer AI, although their relationships have subtly changed due to various events. These changes feel perfectly in tune with what has happened. Overall I'd say that is a must see for fans of the original series but if you've yet to see that series check it out first or this will be rather confusing.
These comments are based on watching the series in Japanese with English subtitles.
