(Tried to hide the spoilers of this latest chapter, but things related to earlier chapters were kept unhidden.)
I love the ending, I just wish that we get some bonus chapters (set before the ending) that would detail on the Megane girl situation with Ichika & Yuu, and perhaps some epilogue with the reaction of everyone when they realize they passed away, though this ending feels as if the story ends with their deaths, so the reader also cannot know what happens after, which I like as well.
The ending gives me the feeling that they went to "another world" but perhaps it really was a quick dream-like situation of Hina right before she passes away. I suppose it depends on your views of the afterlife, hell, etc..
I thought Airi was still alive and was expecting her to get up, especially when she started calling out for Hina, but then the beach appeared.
I honestly didn't expect them to die, at most Airi or Hina doing something really major to one another, but not straight up death. So the ending felt surprising to me.
I do think the author could have fit more chapters before this one, going from the last chapter to this one does not feel right due to the conflict of Ichika & Megane-chan being set up but it was never brought up again. I enjoyed how the author actually made the background characters have a spotlight, and they could have used Ichika more.
What I'm trying to say is that I like the ending for the Airi & Hina side of the story, but Ichika & Megane-chan were left in the dust...
The real sad thing is an autopsy will reveal Airi was strangled, so eventually when they are found Hina is gonna take all the blame.
And the fact that she was the one who sent the text with her phone to her mother would suggest that she was keeping Airi detained. Megane-chan would probably also get into the mix and say some things that would further make everyone think that Hina was kidnapping Airi the whole time.