After his death and failure to slay Muzan Kibutsuji, the Demon King, Yoriichi Tsugikuni was given a second chance and is reincarnated into the world of ASOIAF (A Song of Ice and Fire) to redeem his mistakes and restore peace and prosperity. In this new world, Yoriichi will face a life of hardship, depression, death, and evil. But with his Demon Slayer mark, outstanding swordsmanship, and Sun Breathing, he will change the world of ASOIAF forever. *A/N: I do not own ASOIAF, GOT, or Yoriichi, only my ideas.*