Like the other review, you read one, you read em all.
There is still obviously a story that made it worth reading for me. It's not the authors best but if you like the triangle, school, hard to show love kind of manga it still is worth the read.
Don't get too down sided to the plot as things do have a way of turning out.
There is also that typical type of plot that the protagonist gets herself into a bit of a jam, which could possibly gone better if she just took up responsibility lol. But of course, this is a bit real to the fact she is still young. On the other hand I feel sorry for the step brother, probably because he tried not to feel that way towards her.