Seeing as this is an ongoing manga (there are only 13 chapters available at the time of this review), I will only be covering it up to that point.
"Aharen-san wa Hakarenai", or "Aharen Is Indecipherable", is a short length comedy about a girl who can't seem to be understood. I know this doesn't sound very interesting on its own, but so far it's really funny and charming. It reminds me a lot of "Tanaka-kun wa Itsumo Kedaruge", or "Tanaka-kun Is Always Listless" in the sense that the characters act in a similar way. Instead of revolving around Tanaka being lazy and Ohta reacting to it, we have Raidou, who's trying to get closer to Aharen-san.
Each chapter is about Raidou and Aharen being in different situations, ranging from being in class to going to the game centre. It follows a pretty straight-forward pattern, starting out with either them being in class, or them hanging out, and ending in either them becoming closer or with a funny joke.
If you want a pretty funny and charming manga, definitely give this a try.