Has the manga been removed from the site?
She keeps getting more bandages and marks as the story progresses, but the then suddenly she loses almost all of them. In the later pages, the undershirt which covered her neck is gone, and all that's left under is a mark on her neck and collarbone.
I have interpreted that as a sign that she has not been attending school for so long, her injuries have had time to heal. While that's good from in a physical health sense, it also signifies an ever increasing alienation, which is ruinous to mental health. While the lack of bandages can be interpreted as Yura having already killed herself by that point in the story, and Koma hallucinating her appearance, I do not think that nobody actually commits suicide in this manga: Yura threatens it the whole time, but we do not know if she actually goes through with it, as the story ends just before her final decision.