The long lost Demon Princes and Princess

Tanjiro grew up never knowing his parents with his siblings, Nezuko and Giyuu. Urodaki trained them so they could be demon slayers. (yes sabito is in the story but he dies). They passed the exam but the hashiras don't know about Giyuu's siblings so imagine their surprise when they were called to a meeting bc someone defeated uppermoon 6. on their journey they make friends and find out the truth about their parents and what happened to them. P.S Auto correct is trying to change Urodaki to yoda....