Have you ever seen a girl put stones in her shoes and sand took them off?

At that time, our school had just repaired the plastic playground and runway, which may be due to the construction technology. Plastic particles on the runway always fall off. After running on the runway for a while, I felt that there were plastic particles in my shoes, which was embarrassing. So everyone's evaluation of the new playground is very poor, but I am secretly happy, because every time I run aerobics or go to physical education class, many girls take off their shoes and pour plastic particles on the playground. At this time, the playground is my paradise. Some of those girls have one hand on the guardrail and one foot up. When the other hand pulls hard, their shoes come off. The hand holding the shoes shook, the toes of the white socks hanging in the air twisted, and then they put on their shoes and went back to the classroom. Other girls may be shy. They will find a corner to sit down, secretly take off their shoes and throw away plastic particles, while the cute little barefoot will always hide behind the other foot, or their toes will gather tightly and step on the other shoe.