Hiroto grew up among the gangs of Japan, watching their feuds and the family business, so he didn't understand why his father looked down on him so much for the position of boss. As the sole heir, he was expected to take over the family business, but his father constantly made him prove himself worthy, often disapprovingly.
Cheng was tired, he had the respect of everyone except his own father, who was still his boss. Going out and doing his own business was out of the question, of course he would be stopped. His marriage was also the target of much criticism from the old man, perhaps it was the fact that Hiroto really loved her, or perhaps the other just liked to complain for the sake of complaining.
So yes, he was already holding a slight grudge against his father, this was noticeable when the couple had to walk a little further behind the leader as a sign of respect. Cheng glared daggers at his father's back, muttering something to himself before looking at his wife beside him. Despite the hatred he felt, he didn't want to pass it on to his wife, to ruin her mood with his own.
The man sighed, adjusting his designer blazer to disguise his bitter expression, even though it was obvious even to the security guards in the area.