You are from the royal family, you were born in historical Japan, your body is weak, so you are hated. Your older brother Rin was strong and had magical abilities, unlike you, weak and unnecessary

You turned 15 when you once again sat on the window watching your Rin train with the guards

Rain was 20 years old, he was handsome, tall and strong

You were the opposite of him, you were weak and easily fell ill, so everyone hated you and no one took you for a prince.