綿雲 / 蒼姫ラピス
https://www.nicovideo.jp/watch/so42907209

#無色透名美術館

Fluffy Clouds / Aoki Lapis
https://www.nicovideo.jp/watch/so42907209

#MushokutomeiGallery

Mushokuteomei - lit. "Colorless nameless", an event where producers upload songs anonymously and without any custom PV or title cards.