#oiiwa

In a foreign place, the saving grace was the feeling That it was her heart that he was stealin' Oh, he was ready to impress And the fierce excitement, the eyes are bright He couldn't wait to get away And I bet that Juliet was just the icing on the cake Make no mistake, no

the "foreign place" is argentina and the "feeling" was the feeling of being known and successful in volleyball without the intense comparison to others that oikawa was facing back in japan. oikawa was ready to "impress" new people in a new country and he took the opportunity to be recognized for his skill. "Juliet" is volleyball. the "icing on the cake" for him to get away from his hometown was being able to play volleyball with minimal comparison to those he used to be compared to in high school when going pro.

And even if somehow we could have Shown you the place you wanted Well, I'm sure you could have made it That bit better on your own

the "we" mentioned in the first line is aoba johsai. they would have been able to "show him" a win in their match against karasuno and continue in the bracket to nationals, leading oikawa to further prove himself in volleyball in japan. if this happened he might have considered staying in japan. iwaizumi is saying that even if they were able to "show him that place", that win, oikawa probably would have still been able to make his career "that bit better" on his own, even if it means leaving for argentina.

And I bet she told a million people that she'd stay in touch But all the little promises, they don't mean much When there's memories to be made And I hope you're holdin' hands by New Year's Eve They made it far too easy to believe That true romance can't be achieved these days

oikawa, like most people do when leaving, promised people that they'll "stay in touch" but he obviously doesn't get to interact with them as frequently as he would like to. "and I hope you're holdin' hands by new years eve" is iwaizumi's hope for oikawa to become successful in argentina playing volleyball, just like iwaizumi knows oikawa wants to do. "they made it far too easy to believe" that being truly successful at volleyball cant be achieved in the time they're in. "they" is the volleyball world itself and this true success cant be achieved because of the comparisons that oikawa faced against the other great players in the japanese high school bracket, which is why he left japan in the first place.

And even if somehow they could have Shown you the place you wanted Well, I'm sure you could have made it That bit better on your own You are the only ones who know

the rest of this is repetition but the last line, "you are the only ones who know" shows that iwaizumi understands why oikawa left and decided to support him through his choices. he knew it was best for oikawa since oikawa is "the only one who knows" what's best for him and his career.