They probably only feel it when one of them is hurt.
Thats why there was something about him knowing if he hurt Minchan during it and saying there’s no better way to spend their first time.
If they could feel pleasure then Minchan would’ve been enjoying it so much when seme was ramming him without rhythm and technique but he told him he suck.
So yeah they only share pain sadly.
In the author notes, they say it’s only pain they share. Further, because Bihwan is so strong, he doesn’t feel the shared pain as intensely as Minchan. A stab wound on Minchan would feel like a pin prick to Bihwan
okay so only the pain, what a waste jk thank u for letting me know
also,, i just realized that due to that thing that connect each other, when they were doing da nasty were felling ANYTHING thats why that was so intense right? like doing it in all the right places,, im dumb i know let me alone