Danmachi: A hero is born

There is a boy who dreams to be a hero and save everyone he loves but never got that. But a certain deity grate that wish and send him to Danmachi universe were great adventures make there story. Gone the boy and watch him go stronger and save everyone he cares about. OC, OP from the start rated T for now maybe M in the future and also expect spoilers when I catch up with the LN