Information is-
Title: 双星 -twinkle stars- (Sousei)
Artist: 星名優子 (Yuko Hoshina), 真崎エリカ (Erica Masaki)
Circle: Yucca (ちびっこフォーク (Chibicco Folk) x AZURE FACTORY)
Album: Diastar
Release Date: 2010-12-31 (C79)

It's a very good song,but I'd like to find out what they're saying.I can't seem to find the lyrics anywhere. =w=;;