I don't really think they have a romantic relationship, they are starting to really like each other, and I also don't think it is Stockholm syndrome, I think they are just two people that were broke by the world try to understand one another and also themselves in the process
They are also looking for what we call "happiness" and what it should be for them
I love this it made my heart race, I normally don't cry and this is not the type of manga that I read but it really is good.
It doesn't make any sense for this to be the finale
It was about the sister so wtf is this ending