Firiel Dee is a 15-year-old girl who lives with her poor foster parents in the remote mountain highlands of Sera Field. One day, she is invited to go to a ball, only to discover that she might be the heir to...

On a stormy night, Isamu witnesses a black phantom ship flying in the sky. He follows a man who has descended from the vessel and ends up at the Terada residence. There he finds four men terrified by a threa...