@marconii2002 considering most manga like these ends on volume 12. Vol.11 ended on ch.69 and will release on October 29th USA. We are already on vol.12 with one more chapter left. Vol.12 isn't fully released yet but it will be complete. Not unfinished.
Just in case you want a preview of Chapter 77 (my translation maybe wrong as I don't actively study Japanese as I use to, so I find it a bit hard to get it into English. I don't know how to explain it. It's like I understand it in Japanese but putting into English... how should it be expressed? it's either messy, grammatically incorrect or sounds wrong):
Considering how short these chapters are and there's only one left. It seems like it may end up been rushed and low quality........ Hopefully, it doesn't end with something like Yuki waking up at the end of class, everyone still alive, only to find the whole thing was just a dream she had.