レン君が愛されて仕方ない歌 (Len-kun ga Aisarete Shikatanai Uta)

Len-Kun Ga Aisarete Shikatanai Uta is a song sung by Rin Kagamine, Neru Akita, Tei Sukone, and Len Kagamine with Miku Hatsune doing the chorus. It is a Niconico only song.