パーシャルタイムトラベル　時空の果てに

Jean, who hopes to become a singer-songwriter, spots a mysterious lump of metal at an antique shop he was led to by a girl. Possessed by the metallic object's strange charm, Jean purchases it. It makes a quiet noise as if a machine is running, and Jean is struck by a feeling of vertigo. An instant later, medieval Europe unfolds before Jean's eyes, like something straight out of a history class...