Like all stories like this one, Hunters, Dungeons abd monsters exist.
However, there is no OP MC. No Jin Hoo types. No Kiritos. And definitely no system.
This is a tale of how humans struggle against the demonic forces of dungeons and rarely succeed.
Except for one hunter. A mediocre guy who isn't trying to be the best. He's got bills to pay. He doesn't need a harem. He's got eyes for the girl he grew up with. He doesn't need a system to make him stronger. His strength is in resilience.
He's also a coward.