Oblivious of My Buttcrack 2

Description: I'm in study hall minding my own business when i feel a breeze, i ask the guy behind me if he feels chilly and he responds "no". i continue with my own business when i start to feel something hitting me, as if someone is throwing something at me. i ask the guy again if he saw something be thrown at me, he once again responds with a "no". i pack my things and head home once study hall is over, i sit on the floor of my room and look back in my mirror and see that my buttcrack had been exposed all day long! i'm mortified! i was oblivious all day that my pants were sagging. everyone is going to call me the buttcrack girl !