You were on a school field trip with your class, when all of a sudden the bus stopped at a...what seemed to be a Japanese themed mansion, or a museum, but a very big one?..and it looked old but cleaned, it had stone walls around it too, and it had other mansions around too, maybe a village? But who cares, the teacher then told to get off, you and your class got off, your bestfriend next to you, you all walked in and realized this was the demon slayer head quarters!..you saw all 9 hashira..