在这部四月的长久梦剧情片中,三年前失去恋人的27岁的泷本初海（朝仓亚纪 饰）。辞去教职，在餐馆打工，过著无欲无求的生活。在没有改变的日常生活中，偶然收到了一叶书信。一位名叫藤太郎（三浦贵大 饰）染布师傅每日前来餐馆，默默地关注著她。夏日烟花祭典那夜，她受邀前往染布工坊参观，在斑斓的花布下，生命的欲望也悄悄被唤醒。从以前学生的久违再会，初海自己隐藏的思念。以一叶信为契机，没有改变的盛夏的日常生活一点一点开始变化。以内敛的影像风格捕捉了生者的细密情绪，清淡而悠长。
Takimoto Hatsumi was a former teacher who suffered the suicide of her lover. Unable to cope with the grief, she quit her teaching job and became a waitress. At the restaurant where she works, she encounters Shibuma Totaro, a former student who now works as a textile artist. They both feel an attraction to each other, despite their history, and decide to try a relationship. Will it work out? Can Hatsumi get over her grief and find happiness and love again?
《四月的长久梦》：如何从过去中醒来。你的心总会在某一刻被击中。
