I’M An Ex-Class Hunter

I’M An Ex-Class Hunter summary:

Eight races join hands against an unknown enemy to challenge it to one final battle… However, the eight races were unfortunately completely annihilated, except for one person, a hero of the human race, Arden. Using his memories from his previous life, Kiritani Sho was reborn into the modern world. While fighting as a hunter, he aims to reunite with his previous comrades. Sho may have lost his powers from his previous life, but he was given a chance to awaken after the death of his friend. Now, he goes on to challenge an unknown monster!