It sucks that we don't see much of Airi's perspective this chapter. Her calmness, the fact that she apologizes to Hina for the first time and her saying she will not go back makes me think she may attempt suicide very soon.
I don't want to blame it on Hina because we all know that Airi's sadistic behavior started all this shit that has been happening to her but still, Hina clearly wanted Airi to hit rock bottom. She manipulated her because she wanted Airi to be dependent on her but she should've realized that too much pain will drive a person to commit suicide too. She may lose Airi because of her selfishness.
All things considered though, I would still prefer this to have happy ending. Stay strong Ai, please.