Knowing Juhyeok... he wouldn't want to have sex. He has already refused to have anal sex. If it also crushed his desire to go to Japan... I'm sure he would be against having sex with Su-ah. Therefore if Su-ah simply did it anyway it would be rape. I know you said it kinda as just a joke Vro.. but I wanted to explain why that joke isn't actually funny if you tried to explain it bit by bit.
sorry i didn't explain this properly, but i am not in support of what the OG post said. i explained it better in a different comment. I was just shocked that someone was willing to basically admit that if they were in Suah's position, they would just rape the MC. sorry for not explaining it properly

Su ah...if I were you, I would fck him like theres no tomorrow to the point he can't go to japan anymore.