Teogonia Volume 1 - Tsukasa Tanimai

In the harsh borderlands, humans fight a relentless battle against unstoppable hordes of demi-human creatures intent on stealing their lands, and their gods. After a young boy named Kai receives a life-threatening injury, he starts to recall memories from a previous life. Now armed with a deeper understanding of the unfair ''rule set'' that governs the world around him, he begins to see a new way to fight. And this knowledge may very well be the key to his survival in a world of magic, bloodshed and monsters...