It's giving "How do we relationship"
Is it? They do like each other, whereas in How do we relationship, the connection wasn’t really there (you know, until the end). The relationship in How was a situationship that they tried to advance their relationship despite not wanting to, eventually leading to them going back to being friends, whereas this is more like a situationship that they do want advance their relationship, but they don’t know how to with Japan’s social norms. So like advancing and committing to a relationship through conventional means, e.g. marriage and kids, which is not directly compatible with their relationship.