Wait I think I'm lost. How exactly did yuni's parents die?

Looking at the panel where we figured out yuni's parents died, there was 3 cars crashed into eachother, on later chapter it says another car crashed onto yuni's parents car resulting on it getting crashed to the 2 first wrecked car(iirc), so i think her parents got crushed between the first 2 wrecked cars and their own car

Do you understand this , my explanation is pretty bad

I initially thought of that but wouldn't Yuni get hurt too since she would more likely stay in the car because of the initial car accident. Also how would they connect to the young boy that the parents supposedly saved?

I dont think yuni's car broke heavily so i think yuni would be just wounded badly
Idk about how she save the kid tho