Ruo, a young boy who collects moss and has an unfortunate upbringing, and a masked girl who is called the 'Child of Misfortune' and is confined in a ruined castle. They meet by chance, part ways, and meet again by fate. A 'trial journey' to save the world from destruction. What awaits them at the end is either an inevitable despair or an impossible miracle. A classic and orthodox boy-meets-girl story. A fantasy of love and adventure in a different world. * Completed on R5.3.2.