Cruelty

Tanjiro Kamado lives a quiet, peaceful life with his family in the snowy mountains of Japan, providing for them by selling charcoal at the nearby town. One day, he returns home and finds his entire family slaughtered in a demon attack, with the exception of his younger sister, Nezuko, who has been transformed into a demon herself. A Demon Slayer, Giyu Tomioka, appears to kill Nezuko, but Tanjiro attempts to defend her. Surprised to see Nezuko resist her demonic urges and impressed by Tanjiro's potential, he decides to spare her life, telling him to go find a man named Sakonji Urokodaki on Mt. Sagiri. Tanjiro and Nezuko bury their family before departing.