Between Two Worlds

My heart was pounding. I couldn't hear my voice, only the siren and my heartbeats. There was an emergency. PB and Marceline just came back from the Grand Meeting of Ooo Royalty and from the looks of their face, I know that they have bad news. I was right, they did have bad news. Something very valuable and precious in Ooo was stolen by 'the other world' and being one of the greatest heroes of Ooo, I have to get it back. All the greatest scientists from Ooo gathered in a huge lab in Nature Kingdom. Half of the scientist there was going to find a way to replace that precious something and the other half was to research and find a way to make a portal to 'the other world'.

The military send a letter to me and Jake. It said that we have to stay in a camp and will be trained to defend ourselves in 'the other world' 'cause who knows what's in the other world. So we packed up our bags and travelled to the Bad Lands where the camp is. We were put in groups and luckily, Jake was with me. My hat was confiscated and so was Jake's viola. That made us pretty mad but... It's rather we lose some of our stuff our lose all of Ooo.
We had to do a hundred push ups, sit ups and many more every day. In short, we train for the half of the day.
"My head hurts, Finn..." Jake told me halfway through the training.
Before I could say another word, Jake fainted. I informed the trainer, Maryn. She told me to carry him to the sick bay and so I did. I stared at my unconscious brother in the sick bay. There was a lot of room in it and almost all of it was occupied. We're gonna see more injured people if we give up.

Jake regained conscious a week later. Every Friday we have this battle. We fight other heroes and the champion gets a gourmet meal and room service until the next Friday comes. I was the champion this week's tournament. I shared my prize with Jake. We had fun while it lasted.

The trainers announced that the scientist that worked on finding a replacement gave up and joined the other scientists working on the portal. That means we get harder training. PB mailed a letter to me.
"Finn, I know training has been hard for you but Never Give Up! 'cause you're my hero."
Thanks PB, you really know how to make my day.
Maryn told us that a junior trainer was joining our group. The junior trainer entered our tent and I was surprised to see that the that the new trainer was, Marceline. I don't know if I should be happy or sad 'cause Marceline can be a bit hard on people. She told me she'll go easy on me and Jake so that's a relief.

The scientists managed to make a portal to 'the other world'. The trainer chose five people from their groups. Jake and I were one of them. Marceline got a letter from PB.
"Ooo will collapse in a year. Even if it looks like we have a lot of time, we don't. Tell them to beware of things they don't expect. "
Marceline shared it with the group but some of them didn't take it seriously. Manny Zitsa, (one of the people who didn't take it seriously) fell in a sinkhole. He wasn't seen or heard of then. In a week, the one who was chosen will be sent to the lab where PB is. That's where we use the portal.