When Rancheng C saw Yuki again, it should have been... about a day or two later.
Rancheng C was uncertain whether his sense of time was still accurate. Human "sense of time" is highly dependent on the periodic neural activity of certain specific neural networks. The brain region that perceives time is located right next to the area that encodes spatial information, not far from the hippocampus.
Given that the technology to interfere with the hippocampus and control the transformation of short-term memory into long-term memory is very mature. Therefore, manipulating an individual's "sense of time," making them feel that time has been shortened or extended, is also possible.
