K.K. Lullaby

"K.K. Lullaby" is a calm, slow song that is featured in every games to date. When played on a stereo, the tune is played like a music box, with little metallic noises designed to relax the player. At the end of the song, the last few notes play in reverse, reminiscent of a music box being rewound. The technique is identical to one seen in the 1980 song "Isolation" by British post-punk group Joy Division. Gabi is seen on the album cover, watching Daisy rock baby K.K. to sleep. Snake, Nate, Felicity, Stitches, Midge (all of them prior ), Stu, Maple (both only in ) Claude (PG), Poppy (prior NH), Carrie (in and ), Étoile and Judy play this song in their house if they have a stereo.

On the Animal Crossing e-card, it has a similar picture to the album cover that would later be used in. However, Pompom is rocking K.K. Slider instead of Daisy, in reference to the nursery rhyme Mother Goose.