Only 3 episodes out so far and I would suggest to ignore episode 2, it's practically a fill in. Episode one gets the ball rolling and episode three reminds me of Overlord... however this is not an Isekai, just a dungeon story.
I will leave the rest up to you viewers.
"My Gift Lvl 9999 Unlimited Gacha: Backstabbed in a Backwater Dungeon, I'm Out for Revenge!"