本片是根据森田碧的小说改编的青春纯爱电影,讲述了主人公早坂秋人突然被宣布时日不多,放弃了很多事情,准备平淡地度过每一天,最终邂逅了命运之恋。永濑饰演的秋人充满美术才能,却被查出心脏有肿瘤,被宣告只剩1年生命,出口饰演秋人在医院屋顶上遇到的只剩半年生命的樱井春奈。With only a year left to live, 17-year-old Akito finds new meaning in life by bringing joy to a terminally ill girl who has just six months remaining.