The Fandom Post is reporting that Netflix will begin streaming the second season of the Kuroko’s Basketball anime on May 15, 2021 in Australia and on May 16, 2021 in the United States. As of this writing, it’s assumed it will be another batch of 26 episodes.
The story of Kuroko’s Basketball is described as:
An up-and-coming power player, Taiga Kagami, is just back from America. When he comes to Seirin High School, he meets the super-ordinary boy, Tetsuya Kuroko. Kagami is shocked to find that Kuroko isn’t good at basketball, in fact, he’s bad. And he’s so plain that he’s impossible to see. But Kuroko’s plainness lets him pass the ball around without the other team noticing him, and he’s none other than the sixth member of the Miracle Generation.
Source: The Fandom Post