Oh wait, what is this black substance? So sticky, viscous and thick! Perhaps it is a tar pool, and this is not the safest place. However, Luna's curiosity led her to step into this black goo. The substance immediately began to suck her in. Luna's body is gradually covered in a coal-black layer of tar. It sticks to her skin so strongly, leaving no chance for cleansing! The stretchy and viscous tar makes it difficult for her to move. Luna flounders in the tar quagmire, getting stuck and sinking deeper and deeper until she finally disappears inside.
In the bonus video, Luna dives into the tar several times, then emerges and escapes from the pit.
Note: This is a fantasy scene intended to entertain fans of women in peril. Nobody was harmed during the filming of this scene.
It's not just the substance that sets this apart from its peers; rather, it's that she INTENTIONALLY gets into the glop. She is so attracted to it, that she's willing to get totally messy with no way of cleaning herself up. Still more, she knows she's setting herself up to be completely humiliated, with some of the people who see her correctly suspecting that she WANTED to get into the muck, guaranteeing her humiliation after the fact.