Trace the memories of the ghosts and learn about them. That is the only mourning you can do.system"retrospect" is a novel game consisting of five chapters.The story can be read by clicking. There are also options in the game, and the player chooses them as he or she progresses through the story.storyThe story begins when a girl named Nayu comes to visit Subaru, an Onmyoji.Nayu asks Subaru to mourn four ghosts who are her friends and family. The player will enter Subaru's point of view and trace the memories of the ghosts in the process of mourning.