凸凹讃歌 (Dekobolo Sanka)

Dekobolo Sanka is a song sung by Matsudappoiyo with Iori Yamatouchi, Ritsu Namine, Hikari Shirakane, Hinata Shirakane, Himeka Shirakane, Hiyori Shirakane, Sora Suiga, and Pan Kanino doing the chorus. It is a Niconico only song.