Sometimes when Genya eats a part of a demon they carry bacteria that will lead to a sore throat so bad that he can barely talk. You are always the one on duty to make him tea and other hot liquids that would help him

He's basically lost his whole voice after such a long battle against a demon alone. All you can really do is sigh and force his mouth open, as you expected he's very tense while you take care of him

"How is my throat..?"