＋♂

Background
The singer box on NicoNico reads "Kagamine Len-kun feat. Girls." These "Girls" are the four major female VOCALOIDs: Hatsune Miku, GUMI, Megurine Luka, and Kagamine Rin, in order of appearance. This song can be viewed as the spiritual successor to Gigantic O.T.N.

Lyrics
As this song is still brand new, lyrics are not yet available.