K.K. Bossa

"K.K. Bossa" is a slow, light jazzy tune that is played by K.K. Slider in all the games in the to date, based on the Brazilian music genre, bossa nova or simply "bossa". Frank appears on the album art. Goldie, Mallary, Robin, Peggy, Wendy, Cleo, Lulu, Winnie (In only), Margie, Chai, Tia, Blaire and Marshal (all of the later three as of ) all have K.K. Bossa playing in their homes.

Lyrics
K.K. Bossa is the only song to have been given lyrics—in, it was performed by K.K. Slider at the fireworks festival. Requested by Margie, it quickly becomes her theme song, representing her friendship with the main character, Ai. It was sung in Animalese with a translation running along the bottom of the screen.