(Arc 4-Arc 5) Subaru and company are enroute to the Watergate city of Priestella when suddenly, a bright light flashes and temporarily blinds everyone. At first, Subaru thinks it is nothing, but when he notices everyone else beginning to act weirdly, he wonders what could be responsible for this change. (Arc 5, but if everyone knew about RBD. Post-WHDAAA)
Original story: Continuation of "Another Chance" on Archiveofourown. Not a DIRECT continuation of Re:Forgotten. "Subaru Natsuki has been summoned to a fantasy world! Everything seems so exciting and fantastical, and he even made lots of friends to boot! Though, something still feels off, as if they're hiding something..."