Lost One no Goukoku

 (ロストワンの号哭) is the 12th cover by Afterglow and was originally sung by Kagamine Rin.

It was first announced on August 20, 2018, and released in the Japanese official Bang Dream Game server the same day, and also available in all the other servers for the exception of the Chinese one.

A full version of the cover was later released on NicoNico and inserted in the album Girls Band Party! Cover Collection Vol.2, released on March 16, 2019.