Dark world, lost girl, where am I? In a place of despair, music plays, "Ding, the game begins..." Mixed, chaotic footsteps, rapid breathing... Are paved with beautiful music. Disappeared memories, blank lives... An upside-down world, intertwined with black and white... When the sun and the moon no longer alternate, the stars no longer appear, the light at the end no longer appears. Do you choose to find the past, or move towards the future? Hope, or despair? Ta da da... Ta da da... Dear, I-finally found you, hehe hehe...