Beyond the ninth rank

Kyle Verion was fifteen when the Void Serpents took everything from him — his mother, his home, his sense of safety. All that was left was a promise made over her grave: I will become stronger. I will make them pay. Two months before his Artificial Awakening Ceremony, Kyle finds an unlikely mentor in Elias Thorn, a retired master hiding decades of secrets behind a crumbling dojo. Under his brutal training, Kyle claws his way from powerless to promising — but strength built on rage is a dangerous thing to wield. As the Ceremony approaches and the gang that destroyed his life edges closer, Kyle will learn that revenge has a price far higher than sweat and broken bones. — Description from novelcodex.org