Two Worlds Collide (Sequel to Thousand Tries to Get it Right)

After Marceline and Bonnibel committed themselves to each other, the next challenge is telling their friends. And yet, the night the two work up the courage Finn has concocted an exciting addition to his already crazy party. They get tossed into Ice King's made up world where they're exposed to their alter egos, many of them darker than the group of friends hoped. (F Slash)