アゲハグロウ (Ageha Glow)

Background
Masa's 55th song and one of his more notable works.

While the song could be interpreted in a number of ways, the most common interpretation is that Miku and Gumi are discussing what they think about other girls while participating in other questionable activities.

"Ageha" is Japanese for "Swallowtail Butterfly" but it is called "Ageha Glow" in the Western fandom for the sake of fluency.