Also known as: タイムパラドックス, 时间悖论场景
A chronologically impossible scenario, such as a character meeting their older or younger self, or two characters from different time periods meeting, even if one of them should be dead or shouldn't be born yet.
For example: Asahina Mikuru meeting adult Mikuru, Revolver Ocelot meeting Major Ocelot, or Altair meeting Desmond Miles.