This arc could conceivably end with a platonic orgy and it wouldn't seem out of place
is it technically cucking if u cuck ur past self? hmmmmm
Considering the moment she went back in time she created an alternate self by splitting the timelines, yes. Just like a clone of you isn't you, it just looks like you, even if somehow you were able to copy the memories. The experiences of each individual are unique, thus they are unique, and not you.
This makes Naruto seem really existential and depressing.
I'm calling it now - she's going to have a a cute but superficial relationship with each of the 5 bachelorettes that will ultimately bait the fuck out of us because the faceless love interest is going to swoop in and steal her.
The culmination of this manga will be selfcest 3P that shoots her back to the main timeline. Senpai will tell old MC she knew everything the whole time and was completely into it. Finally, past MC will move out of the shadows and senpai will pull out some fancy time travel magic wand proving that she orchestrated this whole thing.