We thank you once again for the lovely comment! We're glad to hear the writing is getting better haha. It's definitely one of our bigger weaknesses.
As for Charlotte's and Ada's relationship, we can wholly confirm that Yes, they are together after the VN ends haha. It seems we didn't include that in there huh? Never realized it until now tbh.
Secret Satiation is unfortunately our one and only VN that features non-highschool characters, but we wish to do more older characters in the future some time! And we can't thank you enough for giving One's Lonesome so much love ; u ; <3 We're super grateful and touched that you enjoyed it a lot!