 If you liked
Oniichan dakedo Ai sae Areba Kankeinai yo ne!
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 ...then you might like
Saikin, Imouto no Yousu ga Chotto Okashiinda ga.
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Comedy, ecchi, soft romance and a kind of incest; it's all about imouto.
OniAi: harem (girls like/love the protagonist, somehow).
ImoCho: supernatural (the main character's "sister" is possessed by a perv angel/ghost that loves the MC).
Both have the same sibling love where the sister actually want to get banged by the brother, except one sister in one anime despises her step brother and she was posses by a ghost, probably a dead childhood friend, who wants to get banged so that she can rest in peace.