Writers Camp contest!
Regarding NSFW this is what it says when you have the option of marking it as so before posting a chapter:
"In other words, would you think twice before showing this to a parent or boss?
May contain cartoon or fantasy violence and mild language, but should be suitable for general audiences.
May contain violence; strong, vulgar, or lewd language; non-graphic sex and nudity; or other material or themes unsuitable for persons under 18."
Hope that helped, good luck and welcome!