 If you liked
Kiss x Sis
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 ...then you might like
Oniichan dakedo Ai sae Areba Kankeinai yo ne!
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Comedy and fanservice based around brother-sister incest.
OniAi takes a more harem-oriented approach while KissxSis focuses much more on the sisters.
Both are based on the premise of the sister(s) lusting after the brother, with the brother resisting with varied success.