Demon Tamer

Tanjiro's family was lost, and his sister was turn into a demon. But after nearly getting attacked by his newly turned demon sister, he calls out her name and she stopped. After meeting the Water Hashira of the Demon Slayer Corps, Giyu, he learns what is going on with him now. "You, are the Demon Tamer." (OP!Tanjiro, OC Demons, and possible fluff not guaranteed, I'll try my best)