 If you liked
Kiseijuu
|
 ...then you might like
Fumetsu no Anata e
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An alien like creature lands on Earth and slowly but surely starts to learn about the human race. So in that term, these stories are rather similar. However, what these creatures really are, is unique to both stories. There might be some more similarities as well, like how some character communicates with humans and what it learns from them.
Both are really well written.