Hikari Takadaki was returning home later than usual. In the dark carriage of the dilapidated single-car train, there were only two passengers: Hikari and a man named Jun Umadate. His clearly suspicious appearance caused Hikari to feel uneasy… Similarly, Luna Amami was attacked by a suspicious man named Kazuya Murakami immediately after getting off at the station near her home… And in the place where she was taken, she found Hikari, who was already there serving the villains…