#3 Iwaoi: Iwaizumi X Oikawa
Iwaizumi and Oikawa.
Oikawa is awesome, funny and amazing in every way possible. Whereas Iwaizumi is hot headed and straightforward.
The duo make a wonderful couple. Both on and off the field. Their relationship is similar to Kageyama and Hinata, where one is hot headed and the other wants to capture the world.