在这部未来的未来动画/奇幻片中,《未来》将讲述一个4岁男孩的故事，随着家里新成员：一个小妹妹的到来，许多奇怪的事情接踵而来。男孩家的后院的花园里有一个神秘的通道，可以帮助孩子瞬间从外面回到家里。男孩的妈妈和曾祖父年轻的时候都在这里遇到过许多神奇的事情，这些充满魔幻色彩的经历让男孩无比向往，他决定踏上冒险之旅，成长为一个真正的哥哥。
The movie follows a 4-year old boy who is struggling to cope with the arrival of a little sister in the family, until things turn magical. A mysterious garden in the backyard of the boy's home becomes a gateway allowing the child to travel back in time and encounter his mother as a little girl and his great-grandfather as a young man. These fantasy-filled adventures allow the child to change his perspective and help him become the big brother he was meant to be.
聊聊《未来的未来》片中的住宅设计。大家对细田守监督还真是温柔啊。细田守家族观的隽永对望。难以为继的私人影像。导演，咱能请个编剧吗？。不像是催生片，更像是一个二胎家长的反思。细田守结婚之后大概过得很幸福吧…。适合成人看的动画。细田守的雕刻时光。《未来的未来》：每个人都曾经是孩子，曾经年轻过。
