Singularity means a singularity, an individual who is rejected and separated from the normal timeline.
Human beings with a singularity are wanderers of time, and Wakazuki Haruka is one of them.
I think that in the past time, I was just a traveler, and there is nothing I need to do except erase my own existence.
However, as expected, we still cannot ignore them.
Concept: A wanderer of time, also a traveler