From Chibi Manga:

"Who do you like?" "What are your dreams?" "What does the springtime of life means?"
Yuuwa had fun everyday so she thought it was okay! but she got very busy with her club and her extra classes. She started thinking that it was very OK to be like that. And, she will start a club of "calligraphy" with her classmate, Arata, and the one she loves, Yuu.
This is the beginning of her love story!