Arakawa Under the Bridge, Soredemo Machi wa Mawatteiru Recommendations
Humor are the same. Animation style is also identical. We are also dealing with the same airhead MC girl. While Arakawa is the more unique and downright weird, the comedy factor and style of story telling is the same.
Also, both anime are very fun to watch. After your done watching Soredemo Machi wa Mawatteiru, go to Arakawa Under the Bridge right away.