天球、彗星は夜を跨いで

Music video animated and sung by Suisei Hoshimachi for the song Tenkyuu, Suisei wa Yoru wo Mataide. To celebrate Suisei's 1st anniversary since her debut, it was announced on February 22, 2019 that a second original song would be made. The music video, which was uploaded to YouTube on March 22, includes vocals and animation done by Suisei herself, while also featuring art by Nari Teshima.