Introduction: I yawned, fighting off sleep as my professor droned on about the three-body problem鈥攅ven though it was notoriously unsolvable.'Geez, why do we need to learn this?' I thought, shaking my head.Suddenly, a holographic screen materialized before my eyes, its message slicing through the monotony:"Moonfall Has Begun. Your Class Has Been Assigned.鈥滻 glanced around, and saw confused faces all over鈥攅veryone staring, just as bewildered as I was.'Does everyone see this?' I wondered, my heart starting to pound.My screen flickered, then declared in bold: Main Class: Astral Equationist.Before I could process any further, a piercing scream shattered the classroom鈥檚 uneasy silence.I barely had time to register the sound as chaos erupted around me....