ZER09 (or ZER0 9/Zero9/Zero 9) is a Vietnamese boy band under TNT Productions and produced by Tăng Nhật Tuệ that officially debuted with 7 members in 2018.

At the time of debut, the group members were: Leo (2000), Zane (1997), Jbin (1998), Kayz (1997), Minkook (1999), Alan (1994) and Han (1998) – Zane and Minkook would later leave the group, while members Junior, Mew, Win and Eden joined the group at a later date.

To date, the members are Leo, Jbin, Kayz, Alan, Han, Junior, Mew, Win and Eden, making the group a group of nine.

On February 25th, 2020, the group rebranded their name to SUPER9 and added an additional four members, however, the name change would not last long, as they once again rebranded their name to Maniac BrotherZ.