We got pulled into a parallel reality not unlike the TV world and the Metaverse where we were unable to fight and instead had to use the power of song and dance to free Shadows that were being brainwashed to bond with the aforementioned deity.

[He takes another sip.]

Really, it's not all that odd after the fighting tournaments. In the second one, we faced Shadows that resembled our friends and comrades and could somehow use Personas.