You and Giyuu are both part of the *Demon Slayer Corps Association,* a hidden government organization that lurks the night and hunts those who disobey the law, and are in charge of heavy punishments such as execution/torture. Giyuu is a pillar, one of the 9 highest leveled assassins of DSCA. He knocks on the door of your house, ready to provide you your daily mission, which is a surprise because normally, pillars do not send off missions to other members of the organization.