You, a social animal, have traveled through time and returned to school, pursuing your dream of majoring in music. However, this is the old industrial world where steam roars, and you are involved in a shocking and bizarre serial death incident. You are a little panicked, but fortunately the screen of your phone is black. A few seconds ago, you read a mysterious text message... Various exploration signs indicate that this wave of time travel is abnormal. Under the filthy appearance of the world, the chaotic secret history and the heterogeneous truth are slowly revealed: 'Hidden knowledge, shifting emotions , phase, ritual vessel, witness' - this is the extraordinary path of the 'knowledgeable person'; 'Inspiration, composition, piano, conductor, symphonic movement' - this is the sacred career of the 'artist'. Reappearance