Huh, that was... something. I like this ending, but I feel like it should have had way more buildup. There could have easily been another 10-20 chapters setting up this last chapter, but instead it feels like we got a rushed Cliffsnotes version. It just feels like the mangaka wanted to wrap things up as quickly as possible (actually, I think that's clearly the case, considering that Tempest happened 10 days early). That being said, I'm happy Aya and the other girls got a happy ending; they deserve it.
Also lol, yuri twincest is the canon ending.
Oh, and I laughed at Kanami-chan's note. Thanks for all your hard work.