it's May 9th as Mitsuru detects a powerful shadow in the monorail, sending Yukari, Junpei, Minato, and You to investigate what's going on

As you arrive inside the train, the doors lock, trapping you all inside as shadows start to appear. Junpei runs off to prove himself better than Minato and to defeat the powerful shadow as the train starts to move forward. Minato: we're moving. Yukari: it shouldn't be able to work in the Dark Hour!