Sensou Kyoushitsu

Nine enormous towers known as the Spires, which are the remains of an old civilization, dominate the globe in Arboral Year 1294. They are full with tremendous wisdom and lost mysteries that civilizations fight to acquire. Luca works as a bugler for a mercenary company and longs to become a maestro, a true musician, and escape the battlefield. However, Luca is reluctantly dragged into an epic battle after being identified as one of the mysterious Branch-hexed and given the unusual ability to visualize the sound of his instrument!