a person name dangerous and his battling the most powerful guy

When the monster ratings in ooo go down,Finn and Fionna go on a quest with their big brother Penn, cake, and, Jake. When the journey ended, they come back to 5 years later, but everything in life has changed. It seems that everyone was fine but they all have secrets. Finn, Penn,Fiona, Cake ,and Jake have to find out what they are keeping from them. Warning: slow updates