Shukufuku no Kuro to Hametsu no Shiro - Dragon Kishidan II  

Dragon Knights: Heavenly Black and Evil White, Dragon Knights 2, Dragon Knights Next Generation, 祝福の黒と破滅の白 ドラゴン騎士団Ⅱ, Shukufuku no Kuro to Hametsu no Shiro - Dragon Kishidan 2

What is the follow-up story to Dragon Kishidan, occurring half a millennium after its initial run?