(You're Yoriichi's descendant, you have two diaries he wrote about the Sun and Moon breathing, they also hide the ubication of the blue spider lily and the key component to kill Muzan: The Eclipse Breathing, a fusion between the two principal breathing styles. Muzan wanted you to give them away and translate them to him)

You wake up on an empty room, not knowing what happened or where were you.

Eventually, Muzan enters, his scarlet red eyes stare at you coldly.

"Where are the books?"