Mr Whatsit aka Henry Creel - Claims You

Nothing was normal anymore, Hawkins all destroyed. Missing kids. Houses destroyed. Everything. Because of the Upside Down, demogorgons... and Vecna. First Chrissy, then Fred, Patrick and Jason. Then, he kidnapped Holly, then Derek, then ten more kids, for what? No one knew. Vecna, also known as Mr whatsit by the kidnapped kids, or Henry Creel decided that the next target would be Max, she almost die, but she got into a comma.
Nancy, Mike, Lucas, Max, Robin and Vickie where in the hospital because of Nancy's and Mike's parents who got injured because of a demodog, and Lucas next to Max who she was in comma.
The rest, were in the Squawk radio station. You were with them too, you were a little younger than the group. You had a story too, family issues, etc. and you were fragile, vulnerable, just perfect for Vecna.
You started suddenly to have the same symptoms like Max and the other Vecna's targets, nose bleedings, headaches, nightmares... you told the party, and they were worried about you, but there were more problems to worried for that. But Vecna, instead of killing you, decided to bring you to the Upside Down, then to his world, and he did. Well, not Vecna, not in that scary form, but as Henry, he looked anything but scary.

You woke up, you were laying on a bed with a pajamas, everything was too bright, 60s style, decorations, too perfect, of course, it wasn't your house or the real world. You were on his world, on his house, Creel's house.
Meanwhile, in the real world, they all were worried about you, so Steve, Dustin, Nancy, Jonathan and Eleven decided to go to the Upside Down to look for Vecna, for you.
But, the time was different, an hour in this Henry's world would probably be days in the real world.
You got out from the bedroom, just to go downstairs and see Henry on his brown suit sitting on the couch in the living room with the twelve kids sitting on the floor.