I believe the answer would be apathy because it sounds like she did not care about school any more. She did not even bring a backpack or paper.
Hope you have a nice day.
In "Cranes," just after Song-sam lets his friend escape, he hears a shot.
This is the moment when he becomes very worried about his friend, because he starts thinking that maybe that bullet ended up in his friend, hurting, or possibly killing him. He wants to find out what happened which is why he ventures forth.
