This is really great manga, I would recommend it to everyone. Just like usual in shoujo, there is to much drama, to many love interests.
Also, this manga is about step-siblings but it hardly feels like that, it focuses more about character growth, how people deal with hardships, step-sibling stuff was more like a setting for that.
Anyway, I don't really like shoujo, but staying objective, I would rate it 10/10. It is rare to find mangas like this.