It's short but sweet.. Reminds me of ouroboros in some sense.. It's like everything we do now impact the future us.. Or the thing and the future that the future us saw have yet happened and can be change.. It's like seeing a distant future that have yet existed because the last chap looks like they were just about to go to the spot hinata likes but that gave already passed a long time ago..
this is so good!! omg the way the future kageyama wish him luck to the present kageyama just makes me feel aww.. i dont know how to explain it but it somehow give me goosebumps but at the same time feels sad and happy too