After years of absence, Teppei’s joyous reunion with his brother is cut short when the two brothers are attacked. When his brother is kidnapped, Teppei gives chase only to find himself cornered in a junkyard when a miracle appears. His spilled blood awakens the legendary B’t X.

RJ from a rich family? KOYA with a special leaf? SHOOKY at a bakery? 　　Wanna know what these are all about?

RJ from a rich family? KOYA with a special leaf? SHOOKY at a bakery? 　　Wanna know what these are all about?

A Little BIG SOMETHING for UNISTARS!!

来自BT星球的王子TATA，梦想着有一天能將爱传播到全宇宙，和宇宙机器人VAN一起来到了地球。来到地球的TATA发现传播“爱”的最佳方法是‘成为著名明星’，为此他们开始寻找一起实现梦想的朋友。终于，他们与KOYA, RJ, SHOOKY, MANG, CHIMMY, COOKY相遇，梦想成为宇宙大明星的BT21由此诞生。各自拥有不同魅力，在一起时更加闪耀的BT21！ 迎着梦想奔跑的BT21之间发生的愉快又感动的故事仍在继续。

BT21 ORIGINAL STORY将为大家揭秘BT21与竞争对手AT21的未知故事，还有很多充满刺激又非常可爱的小日常，带你走进BT21的魅力世界。