The world was invaded by monsters whose origins are unknown. Monsters eat people. Monsters eat monsters. It was a never-ending war against the monsters, especially since people relied solely on technology and weapons. However, they have discovered that eating the gems from monsters they have killed can grant them superpowers. They can also add the gem to their weapons to make them stronger in battle against monsters.
Hero, the only survivor of the battle against the Monster Queen and high-ranking monsters in his first life now traveled in time. He was given a chance to change what had been written in his destiny.
To avoid the impending death, to discover the secrets of the monsters invading their world, and to know what really happened. He went to great lengths to become the best of the best! Despite the difficulties and challenges he will face, he will continue to stand as he does not want to waste his second life. He will go to any length to kill any monsters he comes across.
