高中女生冈村妮诺（饭丰万理江 饰）虽然渴望成为一个开朗乐观的女孩，然而现实生活中她始终无法与人顺畅自如交往。除了父母外，似乎只有那站在肩头假装标本并被她称为“老师”的鹦鹉（高桥茂树 配音）才是唯一说话对象。紧邻妮诺家的住宅里，住着一个帅气风趣的男孩，那就是与妮诺就读同一所学校的明星学生吉良悠二（中川大志 饰）。即便两人住得如此至今，但是性格有着巨大反差的两个人却从来没说过一句话，妮诺更不敢奢望与对方发生点儿什么。某天，妮诺从父母（安田显 & 三浦理惠子 饰）口中得知，吉良居然只剩下一年的生命了！紧接两人竟然阴差阳错成为了情侣。最后的365天，妮诺陪伴吉良同学一同走过…… 　　本片根据みきもと凜的同名漫画改编。Ninon Okamura and Yuiji Kira live next door to each other, but they have not talked with each other at school. Ninon Okamura learns from her parents that Yuji only has a year to live. One day, Yuiji Kira tells Ninon Okamura that he doesn't want to die and he doesn't to be alone. Ninon Okamura tells him that she will be by his side until he dies.