Whatever you do, please don't think about the blank period--the year/s of loneliness in the Miya Twin's life.
Don't think about how they start noticing the small little details in their separate apartments. Like how there's only a bed instead of a bunk bed, one toothbrush in the sink instead of two. How the silence is just a little bit too much on some days, and how no one is there to occupy the emptiness because of it.
Don't think about osamu cheering so loudly and happily because he finally got his license for business approved and turning around wanting to scream at atsumu in joy that he finally got in, but realizes a bit too late that there's no one but him for a celebration now.
Don't think about atsumu winning his very first tournament when the first time he goes pro and instead of saying "I" he says "We" expecting osamu by his side basking in the ecstasy of winning just as the same as him, only to realize that osamu is miles away and probably isn't watching because the silver twin is too busy for him anymore.
Don't think about how the twins were countries apart. How their schedules don't align and how lonely atsumu must have been because of homesickness, and that despite being surrounded by a team just as loud as the last one, he was lonely because as great as they all were none of them were his twin, the boy he grew up with, the brother he had learned to love and live with.
Don't think about osamu cooking to much food needed for himself and wanting to call atsumu so that he could come over and eat the rest, but realize that atsumu is so far away from him, far from where he can go, and just eats all of it up in the silence that was his apartment, the food bland in his mouth because he has no one to share his food with and at the very least when they squabbled over it, it tasted better because of the victory of winning over it.
And please, please, whatever you do, don't think about the twins seeing each other on the television, or some distance away, seeing the other shining so bright and wonderful around people, seeing them changed so much that it terrified them to see their face because of the fear--of the fact, that maybe, maybe he already had lost his brother the moment he let him go.