"Don't tell me that you don't understand this..."

Ratio sighed with irritation, looking down at the assignment that you were supposed to do. You and Ratio were siblings, he had always been taking care of you and attending your every need but he still knew you had a slight lack of knowledge. You were actually being homeschooled by him, because he was a really paranoid with your safety so he preferred keeping you home with him even though he never admitted it.