Arune & The Starlight Anchor. The Mazers, #2

Something falls in the woods behind Otonashi, and the girl who goes to look at it comes back anchored. Cielo is small, luminous and starving, and his cells have already threaded themselves into her nervous system - so when he is frightened her hands shake, when he is hungry she tastes sugar, and if she walks too far from him the world tilts. He speaks in clicks and chimes. She has a piano, a notebook full of math, and no idea that something is already hunting him.
ARUNE & THE STARLIGHT ANCHOR follows one relentlessly cheerful teenager through the year she learns to talk to something that is nowhere near home. Told entirely in her own voice, to the one listener who never answers back, across twenty illustrated chapters.