【TOB】Girls covered in filth after mass food poisoning

Schoolgirls who suddenly begin to suffer and have diarrhea and vomiting.
It seems that it was caused by the dinner in the girl’s dormitory the day before, and the symptoms were limited only to girls, and even then only to dormitory students.
In the middle of class, they vomited and threw up all over the classroom and were seen by their classmates, including boys.
I had to take my bloomers off during gym class because I couldn’t make it to the bathroom in time.
A woman’s bathroom is packed to the brim, and the floor is covered in filth.
A girl on the swim team defecates in the pool.

Some parts are written in a very factual manner, but of course they are fiction.

48 pages including cover and illustrations
Illustrations related to diarrhea and vomiting (6 pages in total)
Illustration by Akita Moro (5 pictures)
Volunteers (1)