Tensei Shitara SSS-Kyuu Goblin ni Narimashita

When I awoke, I had become a goblin. Reincarnated as a goblin, the lowest-class demon race in a cutting-edge VRMMO game, I get attacked by the hero's army and slain—such an unseemly way to die, just after being reincarnated...! (Source: Kadokawa, translated)