Black Shonen

The story follows a group of teenage secret agents known as Black Shonen, who previously faced the interdimensional terrorist group, the Enlightenment, while trying to secure the powerful Homunculus Books. After their initial defeat, their predecessors, Black Tezuka, stepped in to defeat the threat. Now, the young agents are given a second chance to tackle challenges in the mysterious underground realm of Hollow Firma, where they must confront new dangers and prove their worth as protectors of their planet, Terra Firma.