Shinobi undercover 1.

In Arboral Year 1294, the world is dominated by nine massive towers known as the Spires—remnants of an advanced civilization, they are filled with lost secrets and powerful knowledge that nations struggle to possess. Luca is a bugler in a mercenary company who wants nothing more than to leave the battlefield behind and become a true musician, a maestro. But marked as one of the enigmatic Branch-hexed, and gifted with the strange ability to see the sound of his instrument, Luca finds himself drawn reluctantly into a war of epic proportions!

Luca and his Branched squad have conquered three of four strongholds in the Duchy of Normandy, but the Garland, their target, remains elusive. Assuming the Garland is in Mont Tombe, the coastal final stronghold, they set off again. But the enigmatic and powerful Akira follows in their wake. The forces of the Holy Realm and the Empire now muster for an epic clash. Luca’s skills as a battlefield commander will be tested as the siege begins and the powers of the Branch-hexed on both sides are on full display.