From Chibi Manga:
Ao moved from Tokyo to the country. She's not used to rural life, and leads a boring school life.
She's collapsed often from a headache, and each day is filled with troublesome things...
Then there is Araya-sensei, who encourages Ao's true intentions. After meeting sensei, slowly she is fitting in. But even so, do you know that Ao's mind withering away?