Wouldn't it be possible for a bastioner to kill themselves?
I was asking myself the same thing.
It should be exceedingly rare that you would end up killing yourself, or even someone you know - I mean, assuming the "astral pairs" are roughly limited to the geography of the major cities they work in that's still millions of people in each zone. And although they haven't clarified the percentage of people without a pair, that should lower it even further (even though they seem to be leaning pretty hard on the "1 kill there = 1 kill here every time" angst.) That said, in manga There Are No Coincidences (tm).
That's already way more analysis than this deserves, though. Gamma was way better as a story, even if this has more explicit yuri at the start. And, I've been nothing but on the record as liking big boobs but these aren't even well-drawn big boobs. They completely defy all physical logic. Plus, ok, I can maybe accept that one character is freakishly slim and stacked, but like... every one? And no one notices that a bunch of middle school girls all look like Hitomi Tanaka clones?
TBH I don't feel like Ogino Jun really has his heart in this story. I think he did the old "this + that" sales pitch to an editor (It's Attack on Titan, but with yuri!) without much beyond the hook, and is really just making the barest framework of story needed to draw some busty girls from fetishy angles. (Seriously, do you know any women who at all moments of the day are standing so that you can see their ass and tits at the same time?) And hey, not everything needs to be a masterpiece. It's a little too trashy for me as a serious story - it would be better if it was just an H-manga honestly.