ハッピーバースデーのウタ (Happy Birthday no Uta)

Happy Birthday No Uta is a song sung by Uta Utane, Luna Amane, Momo Momone, Ruko Yokune Female, Sora Suiga, Yowa Shion, Eiichi Todoroki, Teto Kasane, and Yufu Sekka with Kuuspoid, LOKE, Inuhebi, Pamyu, Rook, Mako Nagone, Lacan Giga, Papapa Hidaka, Bou Asane, Suzakuppoid, Koto Fuuga, Ritsu Namine, Tori Shouka, Fjord Danka, Pine Namarine, Hibiki Raika, and Shinji Hibiki. It is a Niconico only song.