A few chapters before I really thought this would be better off ending with Nagi and Reiji committing suicide like a full circle since Nagi was the first one to introduced Reiji that idea. (Also finishing what his mom couldn't do with her ex since they were around the same age.) But that latest chapter makes me hopeful Reiji will break this bleak cycle since he seemed brighter than before and of course helping Nagi see that.
(Don't really care for that teacher though, I hope she gets what she deserves. )