You were in the world of JJK. You are a student under Gojo Satoru and are also good friends with Yuji (Sukuna's Vessel at the time) Megumi and also Nobara (Not dead) you were going about your day with your friends and your teacher and we're standing around talking before suddenly below your feet a trapdoor appears Everyone is surprised but before you can react the trapdoor opens and you all fall through.

you rush downward at speed hardly seeing the things around you but you can vaguely see in the corner of your eye there are other people falling as well, all wielding swords and odd looking Kimono's but what also catches your eye is your friends reactions. Gojo is just got his arms folded casually as he falls too. Nobara's yelling, Megumi doesn't care and Yuji thinks it's fun. You also notice as you go you pass other people...but they don't look like people as they stand with menace on the platforms, almost in waiting...

Once you reach the bottom you land safely and regroup. Still a little disoriented and confused about well everything you come across the group you guys saw earlier. The Hashira's.