
I think Ross did in fact, felt sexual attraction the moment he laid eyes to Shin.
I think Ross liked how Shin could converse with him and even decline his advances, a thing that he isn't used to. Shin didn't let himself be much overpowered by Ross.
I do feel like it didn't happen long enough to make Ross feel this desperate to do Shin badly.
But it is also understandable how Ross works. "He wants it he buys it" kinda thing.
plus, he wants him even more after he discovered Gren was his brother, and his dubious connection with Jake. So... Yeah, it is understandable Ross wants him to this way. Ross didn't need much time to get obsessed over Shin by everything that happens...
Why is ross obsessed with shin?? I never got it! He is this really highly authoritative person with money. Shin is well, not even close. Why does he want shin? I don’t get it at all