Written by Milka Oyasu (who also wrote the stories of The Last Comer, Mystical Power Plant, Riverbed Soul Saver, and Book of Star Mythology), the plot revolves around time stopping in Gensokyo. Joining Reimu Hakurei and Marisa Kirisame, Sakuya Izayoi returns as a playable character for the first time in this fangame series since The Last Comer.