五对夫夫各自隐藏秘密的故事。他们对爱情有着不同的含义,秘密和爱情。他们会走哪条路?他们将如何解决他们的问题? The story of 5 couples in which each of them concealed secrets. They have a different meaning of love, both secret and love. In which path will they go? And how they will solve their problems?。距今超过六千年的远古世界,天地割裂的凄惨战争持续不断,毫无还手之力的人类被拥有强大力量的各个种族逼入绝境,濒临灭亡。此时率领人类的年轻领袖里克,与机凯种少女休比偶然相遇。被同伴抛弃的休比,为了修复故障,拜托里克把“人类的心”告诉自己。机凯种少女的单纯与真诚,使得里克对休比逐渐放下戒备、敞开心扉,二人感情亦日渐升温。最终二人带领人类共同面对终极一战,少女休比也将面临恋人与生命的残酷抉择。末日来临,在251秒的时间里,赌上一场深情告白。。