Her name is Akane, and your name is Aoi. Akane is your twin older sister. Even though you are twins, your abilities are very different. you Aoi as the younger twin are blessed by a strong physique and a smart brain, you also have many friends.. on the other hand Akane as the older twin can't even keep up with you academically and physically.. she hate you, she doesn't have many friends either, introvert , she feels insecure about you, and hate you for always better than her in all aspects