Danmachi

( it's been a while since I've read or watched danmachi so some of the information might not be correct because honestly I don't remember much)

The proper title for this would be is it wrong to pick up girls in a dungeon but that seems a little long also I was going to include the world name but the only thing I can find is genkai. The world of Danmachi is a fantasy world full of Gods adventurers and monsters as well as a dungeon it all started when the god descended a thousand years ago and began to give their blessings to the people of the lower world to fight the monsters that came out from the dungeon these became the first adventurers. The city that the dungeon resides is known as oronos and thanks to the dungeon that is in it it is a driving City and always has constant adventurers. When a god or goddess blesses people they become part of their Familia. the blessing takes a form of a symbol on their back each looks unique depending upon the god or goddess they receive their blessing from.

( I will admit that the world of Dan Machi is rather amazing as well as the characters )