Only teens and kids would call that "romance" and "sex". Its comedy gold.
I don't really see what your problem with the scene is to be honest. Not really sure what you expected either? To be more like an adult film? That would be on brand teen attitude actually. Just like reputable films that aren't all about focusing the camera on "the action" as it were it doesn't show a whole lot but also doesn't censor, a scene done mostly in good taste. Maybe you have a problem with the dialogue? But I mean this is more of a fling between people who just met than a proper romance, though Minthara does show quite a bit more emotion a bit later after the sex scene. But there are no real issues with it, pretty well done overall.
