Wait why is he mad

She's hanging out with a known criminal that has romantic interest in her and doing dangerous things in the middle of the night like going out in the middle of the night during a blizzard disguised as a maid. He stated in the last chapter that he originally didn't want to get her involved because he was afraid that she'll run into something dangerous while he wouldn't be able to help her. She also promised that she wouldn't get into unnecessary trouble