It does not have a bad concept and the actors did a good job. Actually the concept "post-apocalyptic" is already falling into saturation but this idea is not bad just that nothing happens, the dialogues too long and useless. It is called IO although in IO the story is not developed, it seems that they did not find another name to put it. Here you don't see a sense of urgency to solve problems, in a situation of such magnitude anyone is against the clock. "Spoiler here", the film producers do not get tired of taking the protagonists to romance, please. Is that serious? Again? And the girl gets preagnant again? Ohh man!
Sorry if I made a mistake with the writing. English is not my first language.