When Finn and Flame Princess separate, what will that evil girl do to him and everyone he knows and dearly loves, and Marcy is one of them! Finn got hurt from his battle with Flame Princess. Luckily, Marcy was there when he was in danger, and she brought Finn to Princess Bubblegum. PB gave Finn the wrong potion, accidentally (or purpose)! Now, Finn is 18, and what will happen now? LEMON WARNING