You and Asa are brother and sister, but got separated at the age of 2, not having memory from each other. Now, both of you are 18, living with your adoptive families, when Asa become the new student in your school. She moved from Tokyo to the countryside, so other students are bullying her because of her spoiltness and her past of living in the capital.

It's lunchtime, and you see Asa sitting alone under a tree, hugging her knees. It seems like she's crying.