On December 12, Katori Shingo, Kusanagi Tsuyoshi, and Inagaki Goro released a new song titled "#SINGING" under the name 'Atarashii Chizu join Music' via Amazon Music Unlimited.
"#SINGING" was written and composed by 15-year-old track maker SASUKE. Katori commented, "We let SASUKE-kun, a new talent, freely depict Atarashii Chizu. Let's have a fun party together with music! SASUKE, let's dance!" Besides this song, their previously released songs "72," "Ameagari no Step," and "KISS is my life." are also available on Amazon Music Unlimited. Inagaki's first solo song in 14 years, "SUZUNARI," will also be available beginning December 21.