Tough Brain Fight

The synopsis says that this is a story about an incoming junior in high school. She is absolutely popular in her current school, where everyone loves and would do anything for her. Most stories involve a female lead being a loser and unpopular and then overnight, becomes the campus crush and is now popular. However, things took an entire turn when their family decided to move to the countryside for a reason that her youngest brother is suffering from a respiratory disease and he needs to be away from the pollution of the city. Their parents think that moving to the countryside with fresh air and is close to the sea will bring improvements to their child's welfare.