It was the only thing he was ever praised for in his life. Dancing a tradition from sunset to sunrise. Tanjirou held onto that. Whenever he was under stress or insecurities, he would dance. It was all he was good at, after all. When he is nearly killed by Muzan and is turned into a demon alongside his sister, Nezuko, Tanjirou thinks he has been reborn to kill him. Like a star's remains eventually reborn into a new one. Unfortunately, Tanjirou and Nezuko will learn that Muzan had played a more significant role in his family than they realized. (Rework of Hinokami's Blessing)