When a massive, gilled monster emerges from the deep and tears through the city, the government scrambles to save its citizens. A rag-tag team of volunteers cuts through a web of red tape to uncover the monster's weakness and its mysterious ties to a foreign superpower. But time is not on their side - the greatest catastrophe to ever befall the world is about to evolve right before their very eyes.

横滨焰火大会正式开始，薮下依子（杏 饰）与谷口巧（长谷川博己 饰）开始了他们第35次约会。在如此浪漫美好的条件下，两人签订了结婚条款，并且一致认为关于“出轨”的条目没有意义而不予添加。此后不久，二人向亲友们公布了结婚的消息，虽然他们自信满满，但鹫尾丰（中岛裕翔 饰）则认为没有爱欲的婚姻形同虚设。念兹在兹的依子，决定和巧试婚，也即是住在同一屋檐下。依子性格严谨，对生活中每一个细节都有严格规定。而散漫惯的巧无法忍受这种日复一日程式化的生活，他简直要透不过起来。 似乎夫妇间常见的矛盾和危机，终于在两人之间浮现了……