I don’t get it.
Maybe...I’ll try to explain my theory:
- Pure returned back in the past because the “future FMC” wasn’t in love with her and she wanted to change that
- now that she is in love, “present Pure” doesn’t have any meaning to go back in the past (in their current timeline)...
- ...so “future Pure that needs to go back” is not a thing that needs to happen, because “present FMC” is already in love...
- ...and that leads to this, where “future Pure now in the past” is not a thing anymore because, well, she never departed to begin with because she doesn’t need it.
Makes sense?