Danmachi The Exalted

Kane was a soldier who coincidentally saves the U.S from being destroyed in a chain reaction, managing to save the world from certain disasters from war. He was given the chance to get to danmachi, only to be bullied and tortured while despairing because he knew that he could've had a better life. So what, he hadn't had any talent whatsoever, he also couldn't do anything to help his Love, the goddess valkyrie. Was there even any use of living anymore?. Using the sword kurotaishi, the goddess's gift to him before her death, he was sent back to the point where he meets the same rob who teleports him to the Danmachi world. With rather overpowered gifts, this man shall face the unfair world and make changes to save others like him while enjoying his life to the fullest. I have no idea who's art is, but it will be taken down if asked.