The perfume changes small aspects of his demeanor, not his entire personality. At least not that we've seen thus far.
And him being genetically a woman in that form is kind of irrelevant. If he's into men, he's into men. If he's into women, he's into women. I highly doubt that's the direction they're taking this with Gongwon anyway. He strikes me as more of a foil than anything else.
It's established the medicine does change his personality so its not like yo il liking him is out of the realm of reason.
As for the car park dude. It's really up to the author how he'll feel about it. The guy is genetically a women so its not odd to be attracted even if you know their true identity.
Like I said, I'm not saying hes going to romance her. But him having a connection to her does raise the possibility of a romance.
Personally I dont see it not because they are both men but because their personalities dont seem compatible to me.
I reread the chapter that discuses the side effects since I was curious what exactly they stated.
According to Chapter 44 where the side effect of the perfume is mentioned. It states only the "external appearance" changes if he uses the bath bomb.
However from
repeated use of the perfume it brings other "unnecessary components" from her past life. Example states, sense of smell, taste buds, pain, secretions, hormones and nervous system.
So it's not that his personality changes.. it's his body. So if he only uses bath bombs this wouldn't be an issue. It remains to be seen how much of he can really change with continued use.
This actually brings up an interesting precedent. What are the other "unnecessary components"? We must realize that this is his past life. This isn't an random body he swaps with that has no history. What if the memories of his past live comes as the side effect? We already seen precedence of changes with brain chapter 44.
