Z3-B5

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

The first line-up was announced in June or July 2022.

The second line-up was announced on August 14, 2022.

Current Members

 * Kaito (カイト) (Founding Member)
 * Kisumi Megu (姫菫めぐ) (Joined August 14, 2022)
 * Kusaka Hiiro (日下緋彩) (Founding Member)
 * Seru (セル) (Founding Member)
 * Rui (るい) (Founding Member)

Former Members

 * MIWOO (Founding Member)
 * Yuri (ユリ) (Founding Member)
 * Aizu Mei (藍住明以) (Founding Member)
 * Shio Yukina (紫桜倖那) (Founding Member)
 * Minazuki Reine (水無月黎音) (Founding Member)
 * Maria (まりあ) (Joined August 14, 2022)
 * Kotoha (ﾄﾊ) (Joined August 14, 2022)