There's no PC version. Just PSP~
But you can download a PSP emulator so you could play it in the PC.
Also, request in the appropriate section next time or use the search button~ Console game request section | Ore no Imouto EX
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Note: this pc version game is in spanish(no english support) that's I found
Note2: If you found it usefull then feel free to thanks to SEDAC (he made this project).
Sorry, can you please look at my requests and tell if you have it? Thanks in advance.
https://www.anime-sharing.com/threads/request-211210-rj361498-tentacle-works-テンタクルワークス-賢者ちゃんとhな触手.1392118/
https://www.anime-sharing.com/threads/request-231104-rj01109498-takotubo-タコツボ-つくよヴィレッジ.1397470/
https://www.anime-sharing.com/threads/request-misotake-みそテイク-multiple-games.1404036/