???

In the earlier chapters they mentioned that Miho had some sort of illness and condition as well as implying she had a shorter life expectancy

Sure, I know, that's fine and dandy and all. But I don't see what caused her to die specifically in that specific moment, and or if that bitchy twin tail girl keeping her there had anything to do with it is what I meant.

Maybe I'm just being nitpicky, but whatever.

More like check her breathing for fucks sake. ヽ(`Д´)ﾉ

You're not being nitpicky it kind of sucks a little how the mangaka sorta skipped straight into her death without adding much context