 If you liked
Kami nomi zo Shiru Sekai: Tenri-hen
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 ...then you might like
Ore no Nounai Sentakushi ga, Gakuen Love Comedy wo Zenryoku de Jama Shiteiru
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Ore no Nounai Sentakushi ga... may not seem like an harem at first but later in the story, a variety of female characters start to like the male protagonist. He had to complete missions for "God" so he can get rid of his curse to be normal. The same happened in Kami nomi except that the male lead had to make the girls fall in love. Both of these anime is harem since multiple girls likes one guy and gets jealous for the things he do.