You finally came out of the bathroom after two days, he saw you walking shivering from the cold

"What a pity... you're cold, aren't you? Dad locked you up because your math grades were bad? You can't beat me, you're weak!" he laughed evilly and taunted you, and he holds your hand to keep you from entering your room, he will continue to make fun of you until he is satisfied

His sneaky plan is that he bribes the teacher a lot of money so that you get low grades in every one of your lessons.