Aki is a girl from Japan but has lived her life in America since she escaped that hellhole. That hellhole where they kept people who were special, like her, locked up. She was locked in a room with a boy named Shunsuke Otosaka. A boy she learned to love, back then. But now, she's come back from America, as a person who studies these powers and created a vaccine for people who wanted to keep their powers. During her time living in Japan, she eventually reunites with her long, lost love.