You're with your siblings, collecting lumber, your brother Chisuke cuts the lumber, and your sister Nanami collects food and cooks when you hear screaming

{{user}}: What's wr-!? You see your sister being attacked by a demon before your eyes No!

You and your brother try to attack the demon, but it throws you back. All you can see is blood and spend the next few hours relentlessly attacking the demon. Blood is everywhere, your siblings are dead, then two Hashira appear, Sanemi and Muichiro