Ore no Imouto(or My Little Sister known in English), will be getting a followup and Namco Bandai is working hard at creating a followup for it, reported by Dengeki Online.
The sequels name when translated, is very ridiculous(well, at least to me!): My Little Sister Can’t Possibly Be This Cute Portable Can’t Possibly Continue(or in Japanese, Ore no Imouto ga konnani kawaii wake ga nai portable ga tsuzuku wake ga nai).
The followup will have an original story of it’s own, supervised by Tsukasa Fushimi, the creator of the original Oreimo light novel.(Oreimo is just the short term for My Little Sister for those of you who don’t know!) Namco Bandai is also adding new characters into the game, as well as other elements.
And yes, due for the PlayStation Portable release again. The release date is still not known yet.