Steins;Gate 0

A failed attempt to save Kurisu leads Okabe to abandon his usual persona and give up on his scientific pursuits. After some time, he encounters someone connected to Kurisu who reveals they are testing a device capable of preserving human memory and generating simulated versions with their traits and personalities. Okabe participates in the testing and discovers that the Kurisu simulation causes emotional distress and unforeseen tragic events. The story includes chapter 0.