"Battle Royal Valentine" is an original song by the VOCALOID circle, Pantans, featuring MEIKO, Hatsune Miku, Kagamine Rin, Megurine Luka, GUMI and SF-A2 miki. This song is a Valentine's Day song about girls preparing to battle against time and other girls to give chocolates to boys on Valentine's Day. This song is featured in Pantans' album, Pantanzu Exhibition ~Sho no Ichi~. This song is apart of the Gensou Airly series and is the prequel to the song Your Highness☆My Princess featuring KAITO, Kagamine Len, Camui Gackpo and Hiyama Kiyoteru.