 If you liked
Rokudou no Onna-tachi
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 ...then you might like
Kimi no Koto ga Daidaidaidaidaisuki na 100-nin no Kanojo
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While these manga are very different from each other in a lot of ways, the plots are both very similar in the fact that both protagonists go through a supernatural change that causes them to get a harem. The comedy is also very similar and pretty good.