[No Power Capping] [Decisive and Ruthless] [No Female Lead] [Warrior Race] [Interstellar Conquest]...
In the 45th year of the Star Era, humanity entered the interstellar age in full. Clashes between civilizations sparked war, and flames of battle spread across the galaxy.
That day, the homeworld of the Star Giants was baptized in the artillery fire of the Imperial fleet. The energy cannons of the planet-destroying warships shattered Mount Glas, the giants' sacred mountain, and the myth of their invincible God of War was broken.
But the Star Giants' backs were not broken.
From that day on, his life changed beyond recognition, and a new generation of Starry Sky God of War rose amid the flames of battle.
From then on, the rebels, the Empire, the Mechanoid Legion, the bioweapon forces, the mutated overlords, the insectoid race, the xenomorphs, the Predator warriors... All the races of the starry sky became his enemies.
Seek peace through war, and peace will endure.
Amid endless campaigns, that man was destined to make all races tremble. Douglas Kaido: his name was destined to be remembered by the universe.
(Early growth, invincible in the later stages. The blurb falls short, so please read the main text.)
I don't know why it seems so uncomfortable. Writing a book is not easy, so I won't give you a low score. There is still a long way to go.