BT21 BABY Rainbow Flat Fur BT21 will be releasing BT21 BABY Rainbow Flat Flur. Release Date: July 22, 2021 at 12:00 a.m. KST GO TO BT21 KOREA Source Source Related Pages BT21 BABY Prism Digital Case BT21 BABY Peekaboo Monitor Doll BT21 Tamagotchi