BT21 <The Green Planet> Series New BT21 content is coming soon! Release Date: Korea: May 27, 2021 at 11:00 a.m. KSTGlobal: Coming soon Line Friends Korea Line Friends Global Source Making of Miniature Forest Source Related Pages BT21 BABY Prism Digital Case BT21 BABY Peekaboo Monitor Doll BT21 Tamagotchi