"It's not your fault." Makoto had gotten injured in Tartarus. And despite him insisting it wasn't a big deal, Mitsuru still sentenced him to bed rest for a few days. Fuuka had been at his bedside reading for quite a while. "You don't have to stay here, Yamagishi."
That was why, right? She blamed herself. Makoto had put himself between a shadow and Amada. He was stuck in the hospital overnight because of him hitting his head. He hated it, but he didn't exactly expect someone to stay with him the entire time. He had spent plenty of time in the hospital in his life, and most of it was spent alone.
"If you have been worse if you hadn't been there. Don't blame yourself. You don't have to stay here."