If you ever see a listing for this game, do not hesitate. Check the screenshots: if the school rooftop scene has a rich orange sunset, you are looking at the Colored Portable. If the UMD case has a small gold sticker that reads "Color Enhanced Port," you are holding a piece of gaming history.
The Colored Portable version of Ore ga Mita Koto no Nai Kanojo features several improvements and additions compared to the original game. The game includes: ore ga mita koto no nai kanojo colored portable