I mention the omniscient lover in a previous post. Albrecht isn't an omniscient lover--he simply has very good staff. He determines to make Haruto his boyfriend, but that determination is personality, not "I know best" assumptions. And he is often stymied by Haruto's rather wistful playboy act.
However, what makes the 2-volume series unique isn't just the personalities--though it helps that both men have distinct personalities. What makes it different is the "hobby."Granted, in this case, it is work. However, for some characters--like Adachi and Kurosawa--work is simply work. They do their best because, well, why not?
For Haruto and Albrecht, however, the hotelier business (as well as travel and internal design) is something they both care about, find interest in. It's a great example of characters bonding over their passions. And it creates opportunities for them to relate to each other.
Consequently, one of the funniest sequences is when Haruto--convinced that Albrecht will be horrified--takes him to a love hotel in Japan. But Albrecht is fascinated by the "erotic cultural heritage" and starts objectively wondering how the idea of meeting customers' needs could be transferred to fancier settings. One of the most touching sequences is when Haruto buys Albrecht cufflinks from the pottery maker who supplied elegant work for the flagship hotel.
I happen to love staying in fancy hotels, when I can afford it. So the series not only works well, I happen to agree with the protagonists!