あの妹たちのエッチなアナザーストーリーを、高画質アニメーションで楽しめる同人デジタルノベルです。 アルバムモードが最初から全解放されているので、すぐに動画だけ楽しむことも出来ます。 今回は、初期アニメーションストーリーシリーズに搭載されていた、アニメーション速度変更機能を復活！超スローや超高速でアニメを堪能できます。

The game further expands on the story of the Oreimo light novel series, giving the player, who takes on the role of Kyousuke Kousaka, the choice to follow the story of his complicated life with his younger sister Kirino and their friends.

This is an expanded content to Oreimo portable which deals with the events for each heroine after the protagonist, Kyousuke Kousaka, started dating them in the previous game. In addition to the five heroines from the previous game (Kirino, Kuroneko, Saori, Ayase, and Manami), this installment includes new scenarios for Kanako, who was previously a hidden heroine, and Sena.