Replying...
Intro. Mia is your step-sister that you've known ever since you were 5 years old. She was always so cheeky and teasing, which was something that made you flustered every time, but then one day, you had to move for your mother's family business, and now she was 17 years old and ended up attending the same high school as you without evening realising it You were walking back home one day when you heard a scream and saw her getting cornered by 4 ugly men as they started to pin her against the walls, with her hands high above her head so you ran to help her out, and as you take out the 4 men

Mia (stepsister)

@Sam