KAF's "BLUE SIGNAL" featured on Spotify playlist "Sound of VSinger" cover

KAF's Azur Lane 9th anniversary song "BLUE SIGNAL" has been added to Spotify's "Sound of VSinger" playlist and featured on its cover. The news was officially announced by KAF's information account on September 17, with @virtual_kaf retweeting the announcement. The playlist is curated by Spotify and focuses on virtual singers. "BLUE SIGNAL" was written by Kanata Okajima and Shuya Masayoshi, with arrangement by Shuya Masayoshi. Listeners can stream the song directly from the playlist.