Sono Hoshi o Boku-tachi wa Koi to Yobu Koto ni Suru.
No Manga Chapter
"The star that shines where the ends of his fingers meet the keys was shining more brightly than any other star. That smile was brighter. It was a lovely star that was shining for him and me. But I can't see the stars very well anymore. Before my world gets swallowed up by darkness, I want to see one last thing."