It happened during the Vampire Queen's birthday, when the Princess of the Candy Kingdom decided to give her the greatest present ever. Bonnibel had built Marceline a time travelling machine so she could change everything she wanted to change in her past, even her regrets. But what will Marceline do if she finds out that her bestfriend, for the first time in her inventor's life, had miscalculated the machine's components and even pressed the wrong button? What will she do if she was brought to a past of an another person? Read and find out! AdventureTime Ooo Aaa MushroomWars Marcelee Marceline MarshallLee Past YoungMarshall TimeTravel Bubblegum