The announced end is approaching. Each of the SEES members must decide what to do for the days that remain to live before the apocalypse. Aigis continues to wonder: what is the purpose of its existence, if it cannot protect the Shadows' group? And what can it face Ryoji? Either our heroes kill him, and they will become ordinary high school students again, because their memories of the Tartarus, the hour of shadows and their battles would disappear; or they leave him life saved, but they will have to face Nyx! Whether they are ready or not, time waits for no one...