We are now four episodes in and the story has really only just gotten started, with the slow pace turning what should be a tight thriller into a lacklustre drama. All of this should have been edited down into two episodes. I truly cannot understand how all these ingredients are coming across as so drab. Japanese is a stunning and enigmatic setting. In the real world AI robotics are slowly becoming a genuine reality. Throw in a dark mystery and we should be watching this on the edge our seat, not able to walk out of the room for five minutes and miss essentially nothing. Think of compelling shows like Black Mirror and Killing Eve (which this show could and should be a combination of), but instead we get something flat and uninspiring. Sunny is watchable, but knowing what it could have been... just so disappointing.

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