Since Jin-Woo was feeling thirsty anyway, he took the Thermos lid to drink the water. But, his head never stopped tilting in the meantime.
Gulp, gulp.
The water slid down his throat and refreshed him quite nicely.
"Hyung-nim, did you enjoy it?"
Before he had noticed it, the honorific had changed to 'hyung-nim', too.
"Mm.... Yeah, it's refreshing."
Jin-Woo spoke his earnest opinion and handed the lid over to Yu Jin-Ho.
"And, the things you saw in here...."
Even before Jin-Woo could finish his sentence, Yu Jin-Ho quickly cut in, as if to say that there's nothing to worry about.
"Of course! I won't say anything to anyone and take this secret with me to my grave."
"No, hang on. No need to take it to your grave...."
"But, of course, I will. It'll be a promise between hyung-nim and I, after all."
"Well, in that case..... Okay. If you say so."
"You don't have to worry about a thing, hyung-nim."