Z5-A5

 is a group within Zero Project. The theme of the group is K-Pop.

The first line-up was announced on July 8, 2021.

They made their stage debut on August 14, 2021 @KANDA SQUARE HALL.

The second line-up was announced on January 9, 2022 and debuted on January 15, 2022.

Current Members
None currently

Former Members

 * Tsukimiya Ramu (月宮らむ) (Founding member; Withdrew October 9, 2021)
 * Toda Moca (兎田もか) (Founding member; Withdrew October 9, 2021)
 * Airu (あいる) (Founding member; Graduated November 12, 2021)
 * maasa (Founding member; Graduated November 12, 2021)
 * Hana Mai (羽菜舞) (Founding member; Withdrew sometime in November 2021)
 * Aizu Mei (藍住明以) (Joined January 15, 2022)
 * Sophie (ソフィー) (Joined January 15, 2022)
 * Tiffany (ティファニー) (Joined January 15, 2022)
 * Mizuri (みずり) (Joined January 15, 2022)
 * Rui (るい) (Joined January 15, 2022)
 * Mimi (みみ) (Joined March or April 2022)