OST中的配乐变化多端，完美适应了全集复杂的情节发展。Luna,acruiseshipchambermaid,hastoquitherjobtoattendtohersickbrother.Whiledoingso,shediscoversthathermotherhasgonemissingandherbrother'sconditionisgettingprogressivelyworse.Thesiblingsdesperatelysneakintoanemptycon