How to write a composition when a girl wears a skirt and suddenly has diarrhea?

My stomach hurts a little these days, and I have diarrhea for several days. Good afternoon. My sister asked me to go shopping. The two of us went to the movies first, and I gradually forgot about it after watching the movie. We were a little thirsty when we left the cinema, so we bought two cold drinks at the door. Then the two of us went to the jewelry store, and I picked out some small pendants. At this time, my stomach began to growl, and I just wanted to fart all the time. Although someone was around, I was still stiff, regardless of the image of a lady, and then poof, a lot of sparse shit came out, just like a lot of hot, humid and sticky serous things stuck to my ass, warm and comfortable. I continued to pull hard and pulled most of it into my pants, which were covered with shit. Before long, my stomach was upset again. I asked the clerk where there was a toilet. The clerk said that the toilet was far from here, so I had to put up with it. But I know my stomach is bad, and I have diarrhea at both ends for three days. I guess I'll have diarrhea later. My sister said that she would go to the supermarket when she left the jewelry store. Anyway, I think there must be a toilet in the supermarket. As soon as she entered the supermarket, she invited me to buy snacks, but my stomach was upset again. First my stomach turned upside down, and then my stomach hurt badly. A stream of heat wants to rush out of my anus, take out a lot, and it has slowly flowed to the ground. Then she asked me what happened. Did I have diarrhea? She saw that I was pale and my hands were rubbing my stomach. She said she brought paper, and she had diarrhea. We started looking for the toilet, and under the guidance of the road sign, we soon found the toilet, which was a single room with a door and quite clean. The two of us went into two adjacent rooms, and as soon as we unbuttoned our pants, they came out. Green jelly is very thick, mixed with some undigested things and gastric juice. A foul smell came on my face, and my sister was a little better than me, and it would be over soon. My stomach didn't get better because of my sonic boom. See the urinal lira, which is more than three liters. After two hours, I felt all right. I picked up my pants and started shopping with my sister again.

But not long after, my stomach began to turn upside down again. Urine can travel thousands of miles, but shit can't move. My right hand is pressing my stomach, and my face is more ugly than before, and it looks very weak. My fart is mixed with a poop-poop, I groaned and I shit my pants again. "Sister, what's the matter with you?"

"Elder sister, let's go back to the dormitory. I can't hold back, I have diarrhea. "

I shit a lot in my pants on the way, but fortunately the driver didn't say anything.

I didn't go to the dormitory toilet all day today, and I changed a dozen pairs of pants. My sister asked me for leave and didn't go to school for a week.