Happened to me the same, although the last pages hooked me up.Interesting premise, saw the Post-Apocalyptic tag and immediately forgot about it after reading the first few pages and got a whiplash on the last pages
I have my early suspicions that she is the cause of the messed up world, and she wanted it like that to be with him…The fact that she was clearly already an adult based on that one page 10 years ago, that alone changes this manga from cute to kinda gross.