10 years ago Hide, a college student, meets Yuki Gakuko, an older woman, through work. They become lovers with Hide falling hard for Yuki Gakuko. The following year, Yuki abruptly announces one day that she is going to marry another man. This devastates Hide. Hide eventually finishes college and finds a job, but his yearning for Yuki leads him into depression and alcoholism. Meanwhile, Yuki is involved in a car accident and suffers a life altering injury. Now, 10 years later the two former lovers come across each other once again. They are both shells of their former selves ...

临近大学毕业，社会福利心理学专业的毕业生结成棹(妻夫木聪 饰)迟迟找不到理想的工作，看着周围的好友矢岛启太（瑛太 饰）和相田翔平（成宫宽贵 饰）都确定了自己将来要走的路，棹变得更加迷茫起来。就在这样的低谷期时，棹遇到了曾经的天才小提琴手，而现在失聪的悲剧少女萩尾纱绘(柴崎幸 饰)。棹被纱绘所吸引，帮助她走出阴影，让她重拾她所爱的音乐。而与此同时，棹自己也有了勇气和信心，拨开了前途的迷雾，找到了前进的方向。 这部剧以5个毕业生的故事，道出了从学生变成社会人的迷茫，描述了他们生活的状态，对待爱情的态度，还有对将来的彷徨。他们历经幸福，也体会伤痛，但回过头来，这是段无与伦比的橙色岁月。