aisle_(idolmaster)
A song from Idolmaster Million Live!, debuting in the manga. Possibily taken from 'wedding aisle' or the latin word aisle (latin for wings, the same meaning as Tsubasa's name). A solo song for Ibuki Tsubasa that is sometimes sung with Makabe Mizuki and Julia (idolmaster) as backup.
The unit of Tsubasa, Julia, and Mizuki is specifically a unit with no name, so the song name is sometimes used to refer to three of them together.