A 2LDK apartment in Tachikawa City, Tokyo with a rent of 30,000 yen.Although I thought it might be dangerous, I was lured by the low price and decided to sign a contract! As expected, the property was in a terrible accident...There are no ghosts, but goblins and slimes...female knights and female magicians do appear! My room was connected to a dungeon in another world.It becomes a place where all kinds of people gather.I think I'll take this opportunity to go on an adventure in another world.