Ryutei-tachi vol 3. Ryutei-tachi

The Dragonic Era begins. After awakening the power of the Black Dragon and reclaiming the strength of his past lives, Logia Dragonic enters the Gonic War Recruit Academy - a place where the world's greatest warriors gather to master contracts, spirit arts, and the powers that shape history. But the academy is unlike any battlefield Logia has known. Here, he must learn to stand beside others instead of fighting alone.
Alongside Athena, Ash, and Nia, Logia faces new challenges, mysterious rivals, and a tournament that will push the next generation of warriors beyond their limits. As friendships grow stronger and hidden powers begin to emerge, the academy discovers that Logia is far more than an unusually talented student. He is a mystery. A warrior carrying countless contracts. A soul shaped by countless lives. A dragon hidden behind a human name.
When four unknown champions enter the tournament and display abilities beyond ordinary students, Logia realizes the world outside the academy is far larger - and far more dangerous - than he imagined. Ancient forces are watching. Forgotten bloodlines are awakening. And the age of the Dragon Emperors is beginning. In a world where destiny is written by power, Logia Dragonic must decide whether he will become the legend of the past...
or create a future that belongs only to him. Welcome to Ryutei-tachi: DMB Dragonic Verse - Volume 3.