 If you liked
Hitoribocchi no Chikyuu Shinryaku
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 ...then you might like
Dead Dead Demons Dededede Destruction
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When reading these two series, I find an odd connection between them. For instance, there's the alien invasion idea that becomes part of their storytelling. Then, there's the sci-fi culture that is adapted into a rather unorthodox format combining elements of surreal creativity and slice of life. Both series are also known for their relationship dynamics (Hitoriboochi has subtle romance though)