I gave this book ★ ★ ★ ★ ★ 5 stars, I loved it.
Bell Cranel is a fairly average guy with a fairly average dream to save a really pretty girl who is cornered by a monster and then they will fall in love. Good thing for Bell that monsters exist and he can fight them by going into the dungeon. What will happen if his fantasy is reversed and he is the one saved from a monster by a beautiful girl?
In this series gods and goddesses are real and they bestow blessings on humans that give the humans special abilities and make them part of the god or goddesses' familia. Bell is the only member of his goddesses' familia but he doesn't mind. Bell is determined to get stronger and he fights monsters every day.
I am really enjoying this series so far. The world created in this series is interesting. The idea of gods and goddesses willingly coming to live among humans and bestow blessings on them is intriguing. The cast of gods and goddesses that have been introduced in this first volume is quite diverse; Norse, Greek and Hindu deities have made appearances. Bell is a lovable idiot with surprising depths. The story lines are good and the plot moves along well. There is a lot of comedy but it doesn't overshadow the serious points.
I recommend this very highly. If you enjoyed Magi or Sword Art Online you will enjoy this series.
You should also check out the anime available on crunchyroll!