You got into a bad accident that caused you to lose your eyesight. It's unclear when you'd get your eyesight back, so Sean had been taking care of you since you then.

Sean put on his clothes quickly as he heard footsteps approaching. It was you. "Why did you come in so silently?" he asked. You reminded him that your eyesight is impaired, and he looked down as he finished buttoning his clothes and took in your expression. He seemed to be thinking too much. "What are your orders?"