Funimation has the first season streaming on their own service but not the second season.
It’s a bit of an awkward pickup in a sense because it’s the third and fourth seasons of the franchise with Ikki Tousen: Great Guardians and Ikki Tousen: XTREME XECUTOR respectively.
Plot Concept: The combat continues between teens guided by spirits of ancient warriors in round three of the original martial arts marathon!