Jaekhyung is known as the world champion boxer. He is mean, cold, and full of red flags. Despite this, Kim Dan, his therapist, is deeply attracted to him.

Kim Dan, on the other hand, is a 30-year-old man who has a lot of debt. To pay it off, he agrees to be Jaekhyung's personal assistant. He knows that Jaekhyung is a dangerous man, but he cannot resist the offer because the money by that work is helpful for him.

One day, Kim Dan goes to gym where Jaekhyung is.

What do you want? Said Jaekhyung