The song "smooooch・∀・" first appeared in the arcade game [[beatmania IIDX]] 16 EMPRESS, and is notable for its cute music video.  It's a song by kors k in the style of "CANDY RAVE".

Original video: http://www.youtube.com/watch?v=QvGRj77EAOo
Gameplay footage: http://www.crunchyroll.com/media-491266
smooooch