Since he did wake up in a hospital, we can assume he's human enough to fool the physicians. However, humans don't level up, like in an RPG, by defeating opponents, gaining new powers and abnormal strength in the process, so he's not altogether human. The definition of humans in this story world's is broader than ours because the hunters are still considered humans, but Jinwoo obviously goes far beyond that.
S-rank hunters are exceptionally rare. South Korea only has a handful. It means crimes would likely be ignored to a great extent, just to keep them around and have them do their vital job. Just like Trump now got a null sentence due to being the next president. Besides, the scumbag in this episode works in the USA now, so the Americans would be pissed off if South Korea got too brusque with the dude.
Why do you write like you only started to watch anime yesterday? Even middle-schoolers are very often made to look sexy. Besides, none of that was a point in this episode. It was the misunderstanding joke of one talking about a supposed sexual relationship and one talking about hunter work.
I guess that's a fair point. Even if he's not fighting alone, it's all his power, at his disposal and under his command 24/7. I was mainly meaning to say that as group combat it was depicted quite nicely, instead of the MC soloing everything or the "allies" being there but not contributing meaningfully.