Can she take the pain?

Y/n is popular for playing volleyball, basketball and soccer. She also did gymnastics, boxing and ice skating. She might have a sickness but she doesn't give up and keeps going to keep up her dream and to show her parents that she is able to take the heir of the l/n mafia. She also does racing and more you will find out. This will also be mixed with kny (demon slayer) but it is the high school au. They have their own groups ofc, but they will be in different schools but they all now each other. (Has been edited)