Shion is the best student in her class and the protagonist of the story. She won't let anyone near her because she was left disappointed in people a long time ago. Her life is boring and monotonous: during the day she goes to school, and in the evenings she sits by the window and listens to her favorite music. She dreams of changing everything, but the trauma of her past prevents her from doing so. All that remains is to try to keep a fragile balance in the present. But her attempts at a calm and measured life will come to an end when she meets a girl named Akiko. Akiko is a recent transfer student who quickly wins the love and acceptance of those around her. She planned to take the title of best student to be friends with Shion, but the girl saw her only as a rival. This didn't stop the newcomer; on the contrary, she began to look for other ways to attract attention to herself. Why is she so interested in Shion? And how far is Akiko willing to go to achieve her goal? Mirai is Shion's older sister. She forbade her sibling to communicate with anyone or make friends. She justified all the bullying and prohibitions by her strong love and concern for Shion’s future. Despite the fact that Mirai has long been dead, her words and actions still have an impact on the main character. Will Shion be able to free herself from Mirai's influence and get closer to Akiko, or will she always be alone?