Yoshida is a gloomy second year middle school student whose precious youth has been spent stuck in the corner of his class without being able to make any friends. Shigure is the girl who sits next to him in class and she is as gloomy as he is. One day, she struck up a conversation with Yoshida and declared, "I'm going to become a cheerful person!" Thus begins Yoshida and Shigure's battle to become cheerful people in their effort to spend a brighter youth.