Guys it's normal not to know what's going on because this manga is all about questioning about the world building and storyline which is why the title is "blame" (because it's about who is to blame for the fact that their weird world is like that)
This story is realistic... it doesn't show only the good but also the bad in terms of love, which is why at some points the story was so frustrating that it made me want to drop it but at other times it made my heart throb because of how the characters managed to reconcile and love each other again
They are SOAKED