I don't know if it's because I never had a childhood friend or like an adoptive sibling but I always find these pairings weird. I've seen it in multiple manga and I'm still somewhat shocked when they go through with the pairing. I personally feel strong familial bonds with my siblings and cousins, sometimes even close friends, and overall I value family over romantic relationships so to me it's like such a strange concept.
Anyways I'm still interested in seeing how the story unfolds. As long as they aren't blood related and have a healthy relationship then I don't mind. Thank you for the translations!!! <3