Infection
These two live together. They ran away together. Because the boy is a freak, and she loves him. Hinata was surprised at how openly they welcomed her, considering how they must have been treated, but she was glad they were friendly.
The girl welcomed her, anyway, it seems the boy does not welcome anyone. He hurts people, the girl says, and even though he doesn't mean it, they all hurt him more, so he doesn't like people. Sometimes… she starts to say something more, but it goes unsaid.
Hinata watches her closely after that, she sees how softly she talks to the boy, how gently she helps him with whatever he is doing, how she encourages him to speak. How she never touches him.
The boy makes strange noises, sudden noises. He scares Hinata, he reminds her of Gaara, but she doesn't know why really. And once he roared and two eyes popped out on his forehead. The girl went to him then and whispered soft words to him. She patted his back, but their skin never touched. Hinata wonders if there is something, some reason she will not touch him. Instead she sleeps, in the opposite corner that he sleeps in, near the girl.
In the night she wakes up to crying. She watches the girl crying, unnoticed, unknowing.
And Hinata knows, he hurts her, and nobody knows why. And that's why she doesn't touch him, because it hurts her, and maybe he doesn't understand.
How would it feel if your touch was poison to the only one who cared about you? Hinata closes her eyes and her ears and tries not to cry. Tries not to hear the girls pain, her sorrow, because it infects her as well. It would infect anyone who heard it.
And despite her best efforts, it gets Hinata as well, and she cries with the girl, but she cries in silence.