I think the reason people don't know that he is an S-rank (former) is because he went up so fast, worked so hard, and never cared about fame... He only worked because we know he only did that because that was the only way he thought of that he could get a job, then he got a gf (the girl who left...
It looked more like his hand grabbed the closest thing it could (in this case her butt) and her belt was "just right" so when he pulled in her pants and dragged them down a little the belt got over the "threshold" so it is to big compared to her body