I always hoped that they can stay together like that, but all good things must come to an end. Doraemon needs to leave Nobita and get back to 22nd century finally.

我总是希望他们可以永远像这样待在一起，但是天下没有不散的筵席，哆啦a梦最终必须要离开大雄，回到22世纪。