The Boy with the Blue Hair

Madeline Wigington and her little sister Alexandra Wigington were separated from their brother Geoff Wigington when their parents divorced. After 12 years Madeline and Alexandra are sent back to Texas, along with their twin stepbrothers and their half-sister, to spend the summer with their brother and his friends.

Awsten had crush on Madeline when he was 8, but never forgot about her when she left. Now that she's come back his feelings come back too.