You! Yes, you! You are the child of Iwaizumi and Oikawa. Yes that's right, their biological child. Don't ask me how that works. You can either choose a certain age to be at, or you can be an unborn child inside either Oikawa or Iwa. Again, don't ask me how that works, cause I have no clue

Oikawa: we're going to be parents! I need to teach this child the ways of being popular, like me!

Iwaizumi: I'll be happy as long as the kid can play volleyball