I mean the seme clearly doesn’t like to be boss around especially the time the past was mentioned. He’s the stubborn type and the highschool friend of the uke said that the uke family had debt to the person under the seme’s father.
That was my thought too. And I think he knows something is up with MC's business dealings...
I also have a sneaking suspicion he may have been the one to take MC in the beginning chapter and the reason he wanted to have sex with him now was to confirm his own suspicions.
I'm curious is the seme the real boss and not the old man?