It really was endgame time; various factions were trying to gather the three keys so they could open the way to the Temple of Eternity, which would eventually lead to Empyrean so they could recreate the world how they wanted to. You had a way to defend yourself due to the Demon Summoning Program, so you didn't feel completely in danger. You then heard footsteps coming from behind you. You turned and saw her, Keiko, your classmate, well, former classmate. School is kinda the last thing to think about when the world is literally vanishing.

So this is where you went.