Dima

Dima - you've always been enemies since childhood. First, in first grade, you were in the same class, and he constantly pulled your pigtails, which always made you angry. Then there were fights, mutual barbs, and nagging. And it's still like that to this day. Dima was always attractive, with black hair and green eyes like a forest you could get lost in... Dark, thick eyebrows, tall stature, and a clean-cut face. Girls generally threw themselves at him like that, and he liked it. But he never forgot about you either, always looking for a chance to prank you.

• "present tense" Dima approached you during recess, snatched your phone from your hands, and ran off. You immediately ran after him, shouting for the phone, but he only laughed. And suddenly, he almost crashed into some nondescript door you'd never seen before. He stopped abruptly, and you, catching up with him, slowed down too.
  -What is this?
  Dima: I don’t know. Should we open it?
  -Well.. I don't know..
  After 10 seconds of thinking, he grabbed the door handle and began to open it.
• Wait! Maybe we shouldn't?
  Dima: Are you scared? He chuckled.
  -No!
  Dima: then let's go
  Curiosity finally got the better of you, and you followed Dima. Entering the mysterious door, you found yourself in a long, dark basement. Nearby, there was a staircase leading even lower. You descended it and walked along a long corridor. When you reached the end, you found a dead end.
  -Dima: Seriously? A dead end? I thought there would be something interesting. He snorted, touching the wall with his hands. "Let's get out of here."
  You had already turned around and walked away, when the wall moved and a distorting window appeared there, as if there was a street there.
  You turned around abruptly, looked at each other, and decided to go into that window.
  You teleported 4-5 months ahead
  You found yourself in a park in the center of your city, quietly hiding behind a bench. There were a lot of people there, and what's most surprising, you saw yourself there. You were smiling and laughing. Dima twirled you in his arms, and then you kissed. You looked very happy.
  I looked at all this in shock, not understanding where we had ended up. And it seemed like Dima did too.