There’s no question of rape. You could argue assault.
The way I see it, this was an assault, in terms of aggression, rather than sex. Prosecutor Ju is just choosing to punch Lee with his lips. It’s weird and confusing, but that’s how it comes across to me.
The whole thing has strong fan-fiction vibes. I think the writer of story is a fantasist trying to do gritty reality, but unable to actually incorporate plausibility, and that’s fine. It disrupts my immersion, so the stakes dissolve, but I think it works as a reality-flavoured fairytale. I think I prefer minor-adult romance to be fairytales anyway. It has no place in reality.
I have a theory, so I’ll reply to this with spoiler obfuscation on, so if anyone who’s read Payback either…
I think that Jay figured out Sun is his Teddybear when he threw down the coins for the cigarette. The dismissive payment is just like that of the Teddybear. Even if he didn’t know for sure, he had a means to find out his name, and later about the ink, so uncertainty wouldn’t last long. Three people saw Sun topless is the studio, and if Pakin is a crony of Jay’s he might even know about the sun tattoo, and be on the lookout for it. If he isn’t Jay could ask the manager if he had any tattoos.
Ju is nasty. This is going to be obsessive.