Responses
I think it's because there is almost 0 chance uke will fall in love with the old men but there is a pretty good chance uke will start liking the nice guy. Seme doesn't want uke to have eyes for anyone else.
But to be honest I'm not sure if this was written with much thought and actually have a legitimate reason.
Bro wth was this and also how was the seme ok with the old men fucking the uke in the ass but got annoyed when it was that nice guy? But I actually wanted to see the group of old men plow the ukes ass tho if the manga was already shit like this then the mangaka shoulda drawn him being fucked by the old men lol that would've been hot