A young man rents a large mansion for a small amount and discovers that it's connected to a dungeon in another world. He rescues a girl and learns that in the other world he has a status table!

Only a few chapters are scanlated as of March 23rd 2018, but it's a fun read. This is the kind of RPG dungeon adventure that is best consumed in large doses. It's a good set up so far though.

There's a ecchi quality to the text, but it's not aggressively sexual. Unfortunately, it looks like our MC is another person who simultaneously wants sex but turns down every opportunity for it, or at least so far. The MC is 21 years old which is a great departure from the always 15 year old protagonists that you get in a lot of other manga. He has a part-time job, and being able to rent his own place also nicely gets rid of any 'hiding the girl I found in another world' from my parents plotline.

The characters, while not groundbreaking, seem real and distinct, or at least they're a good primer for later development. I look forward to seeing where this series goes. It's a solid 7, and with the addition of more chapters, may be a 7.5 or even 8. If you like Isekai RPG stories with some slice of life thrown in, you'll enjoy Boku no Heya ga Dungeon no Kyuukeijo ni Natteshimatta Ken.