SF-A2 miki is a Vocaloid program. Vocaloid is a singing synthesizer application software developed by the Yamaha Corporation that enables users to synthesize singing by typing in lyrics and melody. Ah Software published three Vocaloids on December 4, 2009. The second Vocaloid that was released is Kaai Yuki which is voiced by a grade school student, hence her grade school girl appearance Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.