Pkpk, Krkr and ShrShr are three fairies who love to spend time together in the Fairy Forest. Each day they sit around a tree stump, sipping tea and debating how to beat insomnia, the origin of rumors and other oddities, taking occasional breaks to peer in on other unique, bizarre worlds through a magical spring. And when boredom gets the best of them, there are always fun adventures to be had such as bungee jumping from space and even playing a game to see how many old men they can jump over!
Both shows revolve around girls who just sit around making absurd jokes. Robot girls in Straight Title, fairies in gdgd. Similar looks, episode lengths, and laughs are either hit or miss. Check them out.
Although the setting and backstories are different, these shows are actually very similar thematically. They revolve around a small group of girls coming up with bizarre ideas and then testing them out with hilarious results.
Both shows are animated using MikuMikuDance, and the chit-chat between the characters sounds very similar, so I suspect that it may actually be the same people behind both shows. Anyway, if you like one then you'll quite probably like the other.