I was like, is he going to be okay? Does he have a cold? Does he have pneumonia? Does he have a family to take care of? Oh man, I hope he's alright in the next chapter
I know, right? Does he have the "flu" that must not be named? Is Chiiz Wiz going to get Long FTMNBN and Spazuya will become her caretaker? How did he disappear from the train on the next page, is he a ninja?
Or was it intended as a subtle "meaningful" cough, and she looked up because she was scared (BA-DUMP, which I imagine was a doki) someone would catch her in the crime of not being a paid escort?
Thankfully that last one was pretty easy to dismiss. Everyone knows Reiji, subtle, and meaningful don't belong in the same sentence.
I'm reminded of an old MST3K… The characters are on a bus, and for some reason the director thought it was worthwhile to show the bus stop and two unrelated nuns get off. One of the robots whines that instead of the movie, "I wanna watch the story of the nuns going home."