Es!!!! Oh, I love him. This was such a wonderful game, all the time spent inside Es' mind so familiar and sad at the same time. That feeling of a million things going on inside your head and gesticulating none of them outwards, especially the more graphic intrusive thoughts, and how they'd be even scarier during an apocalypse scenario.
The relationship between these two felt real and raw and very painful, I love how you wrote them. How those 12 days felt like an eternity and like nothing at all because they barely know each other. And even then, I'd love to see them together for a lot longer :D The writing, prose and dialogue, were exceptional.
I liked the apocalypse too, you could've gone with something more vague or unexplained but you really went into detail and came up with a horrifying and yet very interesting end of the world, I love the idea of the falling stars and what they do to people.
Also I'd be remissed not to mention the sex scene, which was very very good!! Great job with this VN :D