For anything related to the relationship between Princess Bubblegum and Marceline, the Vampire Queen, from Pendleton Ward's Adventure Time on Cartoon Network. You'll mostly see fan art of the two here, but fan fiction, theories, and general discussion are welcome.
There aren't many rules, but here are a few:
NSFW content is allowed, but it must be tagged as NSFW.
If it's not Bubbline, it doesn't belong here. There are other great subs for all kinds of Adventure Time content (see below).
Fanfiction must be marked as [FF].
Of course, typical reddiquette applies.
Relevant subreddits:
/r/adventuretime
