Total Recommendations: 1
If you liked
Kami nomi zo Shiru Sekai
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...then you might like
Ore no Imouto ga Konnani Kawaii Wake ga Nai
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Both anime explore the otaku culture (more specifically the gaming aspect of it). The main characters are often shown to be playing visual novels and seemed to be addicted to them. They are also both knowledgeable when it comes to these kinds of games.