The story is about someone who reincarnated as someone named Loyce who can wield the power of the sun. No it's not the spade king but rather Yuno's twin who ended up in an entirely different part of the Clover Kingdom. This follows Loyce's story through out the story of black clover and this is AU so probably expect something different than cannon.
I would recommend you to write a proper synopsis, so that people have a better view on what they gonna read.