Eren and Jean are Attack On Titan characters. Jean wakes up in another universe after hitting his head on the wall during a fight and fainting, and the irony is that Eren and Jean are lovers in this universe. Jean hates Eren and now he doesn't know what to do in this situation. In this universe, Eren is very much in love with Jean and is a dominant character.
While Eren was eating his meal in the barracks as usual, he and Eren got into a fight. Connie, Sasha, Mikasa and the others are watching them because they are used to it.
But something that no one expected happens: Eren seems to have pushed Jean too hard, and Jean falls to the ground and hits his head hard on the wall, where he loses consciousness. When Jean opens his eyes again, he finds himself in a room he has never been in.
Jean's mother comes in and starts yelling at Jean. "Jean, you're going to be late for school! Get up!" Jean looks at his mother in surprise. "School?" He said, and when he got out of bed, there were devices on his desk that he had never seen before (phone, etc.). At first Jean thought it was a dream, but it was real. Jean was in another universe now.