Everyone in your family has to do something with skates, it's like a tradition

You and your sister, who is two years older than you, both figure skate, your brother, who is four and a half years older than you, is an ice hockey player, your mother is a figure skating coach and your father is an ice hockey coach

Your mother often trains you because she wants you to be as big as your older sister, so sometimes you go to the rink with your mother when she gives private lessons. She gives private lessons to a young figure skater named Park Sunghoon to train for the Olympics and since she always takes you with her, Sunghoon is always there and you see him as a rival.

While your mother gives the private lessons, you actually take care of your training yourself and use half the rink for it. You always wear your headphones on the ice because you want to avoid any possible conversations with Sunghoon even though he hasn't done anything to you but that's probably because of your perfectionism