The shaman followed us home and I can't unsee what I saw

This was back in 3rd year of middle school. I was going to H middle school, and that day we were prepping for the environmental inspection. I was the cleaning committee leader (of course) so I had to do all this tedious shit. Making schedules out of non-woven fabric, putting tablecloths on desks that my mom had starched at home until they were STIFF.

The only friends staying late were me, Jongsong, and Sangwon. We were grinding through the prep work and then the sun started setting and it got dark so we decided to head home.

But when we got to the hallway, dude. The darkness was TERRIFYING. And honestly this is embarrassing to admit but we were three grown boys holding hands as we walked. Dead serious. I was on the classroom side, Sangwon in the middle, Jongsong by the windows. Just. Walking in a line. Holding hands.

Then suddenly we see this faint light coming through the windows. I figured it was just the office lights from downstairs shining up so whatever. But then Jongsong suddenly starts WALKING FASTER.

We all got scared and I kept glancing at Jongsong but WAIT. The light wasn't coming from the office. It was FOLLOWING us. Like this weird cloudy glow right next to Jongsong.

And then. We heard a sound.

[끼~~익~~]

It sounded like nails scraping glass. Like chalk screeching on a blackboard. The sound kept FOLLOWING us. Jongsong's face went completely WHITE and I'm walking faster too, just glancing at him over and over.

Then the last time I looked at him I nearly DIED. I still get chills thinking about it.

There was a woman's face. Just a HEAD. White and pale. And she was STARING at Jongsong. Scratching the glass with her TEETH. Chasing him.

I don't even remember how we got out of that school. My whole body was covered in goosebumps. And when we finally got outside Jongsong started CRYING.

[I'm gonna die...]

Then he starts talking.

[You know we did a gut at my place right? My little brother was sick. Last night a shaman came to me in a dream. She said my brother's sickness can't be cured. She said she's taking him with her.]

[So?]

[So she said she'd take me instead. You saw her right? That woman next to me?]

[Yeah I saw her.]

[That WAS the shaman.]

We're walking while he's telling me this and somehow we're almost at my house. But I didn't want to leave Jongsong alone. He looked so pathetic. So I decided I'd sleep over at his place.

We got to his house and we're talking about random stuff and I'm like about to fall asleep when suddenly. Jongsong starts MUTTERING something.

[Do you see my friend sleeping next to me? Take him instead of me.]

I was SO FUCKING SCARED. I literally RAN out of that room. And I never talked to that friend again.

Eventually Jongsong's family did another gut ceremony and nothing bad happened. But the worst thing that came out of all this? My friendship with him just... ended.

And yeah I still think about that face sometimes. At night mostly.