As she enters junior high school, Kouya Yamanouchi, the daughter of a famous writer, is a shy girl. Though intimidated by Yuuya Kannatsuki, a boy she met on her way to school, she is chosen to be the class representative alongside him. Despite their efforts to collaborate, Yuuya always seems displeased with Kouya, while she is consumed by her timidity. Nevertheless, little does Kouya know that Yuuya has a hidden secret - her revered father is set to marry his mother!