For anyone who asked is this the end, the answer is not really. The chapter was purposely written such that it felt like the end. Link of Hata sensei twitter on this chapter is as follows (if you can read japanese):
seriously speaking, it's nice to finally know her reasons, even if it sounds so weird in the real world.
but hey, it's perfectly accepted by both of them, so who are we to judge?
pretty comfy chapter overall (pretty late upload though)
we're definitely gonna try and fuck that moon up, we have plenty of methods...
Hmmm, this has all the feelings of a "final chapter" but is obviously not since the author said it isn't. I wouldn't be surprised if this is an arc specifically created to make a good stopping point for an anime adaptation.