In case you haven't heard the good news, Pop'n Music Portable is on its way to the PSP, complete with 9-button mode and the classic art style fans have come to love. Now according to these screenshots spotted on Andriasang, this version also appears to include some kind of story, career or adventure mode as well.
In the gallery you'll see a few shots of Mimi standing on a board game type of map, which you'll presumably have to work your way through in order to unlock new songs and such. That should add a nice layer of depth to the game, and it'll be fun to see what the other characters she meets along the way are up to.
You'll also see that the game retains the familiar Pop'n look while you're actually playing the songs, which should promote a sigh of relief for fans who might have been anxious after seeing the upcoming Wii game. Check it all out and let us know what you think.