Lips Series

The Lips Series (唇シリーズ) is a group of songs composed by Akibawota-P. It currently consist of four songs and a spin-off song, each titles beginning with "Sono Kuchibiru Wa" (その唇は, which means "Those Lips Are"). According to the producer, each song has a specific theme depending on which Vocaloid sing it.

The first song of the series was "Sono kuchibiru wa Joutou Nari" (その唇は上等なり, Those Lips are Becoming the Best) sung by Hatsune Miku.

その唇は軽薄なり / Sono Kuchibiru wa Keihaku Nari (Those Lips are Becoming Frivolous)
その唇は傲慢なり / Sono Kuchibiru wa Gouman Nari (Those Lips are Becoming Haughty)