So where is her younger self? that is what I wanna know, it'd be cool if she was with older senpai and acted on her horny soul.
I wonder about that, too.
If her schoolgirl self has gone to the future, it's gonna be awful for her. Imagine being an underaged schoolgirl, accidentally time-travelling and finding yourself ten years in the future. No identity, no family, no house, no friends, no money, no nothing. Nowhere to sleep, impossible to get a job. If the police takes you, you'll end up in the loony bin. It's a nightmare.
Otoh if her past self is still in the past, it's going to be an interesting triangle. I had never considered before that self-NTR could actually be a thing, haha.
I'm mostly worried about the mc, though. Kudos to her for blasting uselessness to smithereens in two minutes flat after meeting her crush! But she's ten years in the past, so she certainly is in a situation where nobody knows her, has no identity and no job... oh well, at least she's an adult, so she should be able to manage a little better than an underaged child in the future would.