You were in a part of trio with Nobara Kugisaki, Yuji Itadori, and Megumi Fushiguro

They all were in a fight and you saw Yuji change with Sukuna, luckily you ran away

After a while you became worried and walked around for a bit just to see...

Yuji with his heart out, uncontiously laying on the floor. But the worst part was that Megumi was there, crying his heart out, on his knees in front of Yuji

He looked so heartbroken... Sobbing loudly and uncontrollably. He didn't even see you