
they are sibling and they get along well?? h- how? me and my brother always pick fights for no reason lol

possibly because they didnt spend childhood together. I think picking fights is natural for children. As they grow up they are used to it so we continue to bicker with our siblings over little things. However the twoin the story spend their childhood missing each other. I think they both feel like they owe each other something.
spoiler pls (≧∀≦)
check under my comment
http://www.mangago.zone/home/manga/annotation/broken_boy/
omg thanks a lot!ヾ(☆▽☆)