 If you liked
Tokyo Yaban no Chizu
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 ...then you might like
Elle to Takara
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Both stories feature an adult character having a long-lived relationship with a much younger character (or at least, a character that appears to be much younger). Both of them have a lot of sex scenes, and both feature characters with slight anthropomorphic traits, such and animal ears/tails. Map of a Tokyo Savage has more plot than Elle to Takara.