 If you liked
Kanokon
|
 ...then you might like
Tasogare Otome x Amnesia
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Similarities:
Same strange mysterious girl to normal guy arc.
Same sotacon relationship between girl and boy.
Same mischievous girl poking fun with the guy.
Same school and supernatural genre.
Dissimilarities:
One is a ghost while the other is a deity.
The guy ( aside from the relative) in the other anime is the only one who can see the girl, while in the other anime the girl is very visible to everyone else, but only a few knows that she's a deity.
One has censored fanservice while the other has intense fanservice.
One has an extra comedy, romance and ecchi genre, while the other has mystery and horror as it's extra genre.