Risa used to have an older brother, named Riyuu but when she was 15, her brother left her without any news and not just leave but he caused a chaos in the house. Risa nearly lost her mother when her parents fought about Riyuu's pursuing his career as an idol. It came true. Her mother died not long after Riyuu's left. Since that moment, she believed Riyuu was behind her mother's death and also s