In my old school, grey school shorts were part of the uniform. There was a time when we had a school play and the actors in grey school shorts had to do a lot of running around on stage. It was quite funny to see them trying not to trip over their own shorts while acting.
Yes. There was a sports day at our school. All the students in grey school shorts were running in the races. It was a sea of grey shorts moving around the track. It was really exciting to watch.
Well, without knowing the story, it could be that the red color of the boxer shorts is significant. Red is often associated with boldness or being noticeable. Maybe in the story, the character who wears the little red boxer shorts is trying to stand out or be different.
If 'Shorts Cuts Novel' refers to short novels or short story collections, one characteristic could be their conciseness. They manage to tell a complete story in a relatively short space.
Perhaps the girl's shorts are made of a light, flowy fabric like linen. They are white with some pastel-colored embroidery around the edges, like little flowers. They look very summery and give the impression of a carefree, beach - going girl.