An incident at the USJ sends four UA students spiraling into another world, where quirks don't work and the supernatural runs rampant. Will they thrive in this new environment and find their way home? Or will the dark secrets of Gravity Falls claim new victims?

Even with over fifteen years of peace between Britannia and the world at large, corruption and evil still seep through the cracks. Ren Amamiya hopes to change this with his friends as Phantom Thieves. The problem is, Ren was once Lelouch vi Britannia - even if he doesn't know it yet - and his past life isn't going to let him go so easily.