 If you liked
Kannagi
|
 ...then you might like
Mayoi Neko Overrun!
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Both shows are about a rather plain boy who is surrounded by a strange girl who just shows up in his life, his childhood friend who has a crush on him, and a very close but strange group of friends in which they make up a club at school. Both anime are ridiculously funny, very random, and deal with many elements of otakuism.