The object of Veecaloid is to gather various objects littered across the screen, themed to either a Magical Girl or pop idol. The main character is a vocaloid based on (and voiced by) voice actress/singer Cristina Vee.

Fans are raving in anticipation of Milky's celestial concert! But Milky must first harness cosmic idol energy… while secretly charging up her magical girl alter-ego to defend the planet! Rapidly switch between modes to catch energy data, but don't mix them up or Milky will malfunction!