The members ran into the bathroom with him.

"What the hell happened to me?! Why am I so little?!" Jungkook screamed and started to cry.

The members weren't sure what to do.

"Do you need me to call your parents?" Namjoon asked. They thought maybe this little 15 year old kid had hit his head or something.

"Hyungs it's me! It's Jungkook! I don't know what happened, but it's me! I live here!"

"Okay well if you're Jungkookie tell us something only he would know," Taehyung suggested.

To their surprise, he told them a ton of things only he would know. He could have gone on and on until Jimin stopped him.

"Woah, you are Jungkook...but how...oh no way! That weird stuff you drank yesterday at the fair!! They said it'd turn you younger or whatever and you drank it! It worked!" Shouted Jimin.

Everyone started gasping in disbelief.

"Jungkook?!" Jin lifted the maknae's arms to inspect him. "You're so cute!!"

All the members started pinching his cheeks and "Awwww"-ing him.

"Hyungs stop it! This can't be happening! I don't want to be 15 again!"

The maknae looked back into the mirror and kept crying. The only reflection in the mirror was the kid he was eight years ago. His hyungs practically towered over him now, and he had no muscles just like before.

"It's okay Kookie, the people said it would only last three days, you'll be yourself again by the end of the week," Hobi reassured him while smiling. He thought Jungkook being so little again was the cutest thing in the world.

"But they also said it was a failure! It's not supposed to work! What if I don't turn back?!" Jungkook was on the verge of a panic attack.

"If you don't turn back in three days we will call them or something," Yoongi told him.

Yoongi stepped behind Jungkook and looked at both their reflections in the mirror. "I don't remember him being this little when he was 15. Why is he so little?"

"He was that little, but so were we. We're all big now so he just seems smaller," Jin replied.

"Uhh! This sucks!" Jungkook walked back out and into the kitchen as his hyungs followed. They couldn't take their eyes off of him, as they were filled with both amazement and shock.

Jungkook took a beer out of the fridge and cracked it open.

Jimin ran over and grabbed it. "Woah, uh...I don't think you can be drinking that."

"What? Why not?" Jungkook asked surprised.

"Well, wouldn't this be considered underage drinking or something?" Jimin asked.

Jungkook snatched the beer back and took a sip. "Hyung, I'm 23!" he yelled.

Yoongi walked over and ripped it back out of the maknae's hand. "We know that but I don't think alcohol is the best choice for the body you're in. It will mess you up. No alcohol until you go back to normal."

Jungkook shot the rest of his members a pouty look, killing them with the same giant doe-eyes he used as a kid to get what he wanted.

"Awww!" yelled Hobi "He's so cute!!" He went up to Jungkook and hugged him. The maknae let out a groan, he already hated this. Namjoon walked over and handed Jungkook a banana milk from the fridge instead.

Jungkook stared at it. "Seriously?"

Namjoon couldn't help but burst out laughing. "It will help you grow big and strong!" All the members started to giggle.

"Ugh!" Jungkook snatched the banana milk and stormed back into his room, slamming the door.

"Remember how moody and rebellious he was at 15? This is going to be a rough couple days," Yoongi informed.

Taehyung let out a chuckle. "Can we keep him?!"

"He's our maknae of course we're keeping him." Hobi didn't understand Taehyung's question.

"No I mean little Jungkookie! I want to keep him! It's like we have a kid!" Taehyung teased. He always talked about wanting to be a dad, this situation practically had him feeling like one.

"I already raised you all once! I don't care to do it again! Especially as teenagers! You and Jungkook were the hardest to handle!" Jin told Taehyung.

Taehyung put his hands on his face and pinched his own cheeks. "But we're your favorites!"

"Now what do we do?" asked Jimin. "What do 15 year olds need? Do we need to get him new clothes or a car seat or something?"

Yoongi bursted out laughing.  "A car seat?! Jimin he's not two! He doesn't need a car seat!"

"He's small, I don't know!" Jimin replied defensively.

"It should only be a few days. He should be good on clothes, he'll just have to drown in the ones he owns until he fits in them again," Namjoon said.

Jungkook came back out of his room. "Hyungs I'm sorry if I was rude. This just has me freaked out."

"Oh don't worry about it. We'd be freaked out too if it happened to us. You'll be fine!" Hobi walked over and hugged him.

"We're still going to the amusement park today though, right?" the maknae asked.

The members had been planning the trip for a few weeks, and Jungkook was the most excited as he was the biggest adrenaline junkie out of all of them.

"I mean, we can still go if you want to," Jin answered. "Someone else will have to drive."

When the group had made the plans, Jungkook volunteered to drive everyone as it was about an hour trip. 

"Why? I can still drive. Just because I'm smaller doesn't mean I forgot how to drive."

"Kookie you can't drive. You're too short, first of all, and secondly your license picture doesn't match what you look like right now. If we get pulled over we're screwed," Jimin told him.

"Oh, yeah, right..." Jungkook pouted.

Jimin offered to drive them and everyone thanked him. Jungkook ended up wearing some of Yoongi's clothes, he had the smallest size that closely fit Jungkook.

Jungkook ran to the car and jumped in the passenger seat. "I call shotgun!"

Namjoon walked up to him. "You have to sit in the back."

"Why? Can't you guys let me do ANYTHING?" Jungkook whined.

"You don't weigh enough to sit in front." Namjoon pointed to a child safety warning label on the visor in front of the seat. It had height and weight requirements for the passenger, in which Namjoon already knew Jungkook didn't meet the weight requirement considering eight years ago he didn't either.

"I told you we should have gotten him a car seat!" Jimin laughed.

Jungkook shot his hyung a dirty look as he moved himself to the back of the SUV. "I can't wait for this to be over. How did I survive this once already?" he asked.

"Because the first time we were all going through it together. And you were mentally 15 back then. Now you're 23 but just look young. I'm sorry, I'm sure that's not easy." Taehyung did feel a little bad for his maknae.

They arrived at the amusement park and hopped out of the car. Jin offered to pay for everyone's tickets, and they all couldn't help but laugh that Jungkook's was actually cheaper because his was considered a youth ticket and not an adult ticket.

"You mean to tell me we can get discounts with him?!" Hobi pointed to Jungkook, they both started laughing.

"I agree with Taehyungie, I want to keep him little!" Jimin hugged Jungkook.

They walked around the park for a bit and went on some of the milder rides.

"Hyungs I'm going to go on some of the more intense ones now. I'll text you." Jungkook started to walk away on his own when Jin grabbed him by the shirt and pulled him back towards them.

"I don't think it's a good idea for you to be walking around this place alone," Jin said.

"I walk around amusement parks alone all the time, hyung."

"I know, but...I just don't want you to get kidnapped or something."

Jungkook stared at Jin with disbelief. "You can't be serious?"

Yoongi started laughing. "Jinnie-hyung you aren't seriously worried about that again are you?"

When they were all younger, one of Jin's biggest fears was one of the maknae's getting hurt. Back then Jungkook had always been the smallest, and he was the youngest which made Jin extra anxious about something happening to him.

Whenever they would go out in public Jin would hold Jungkook's hand or tell Jungkook to hold onto one of his other hyung's hands when they were in big crowded places. He had this unexplained fear of Jungkook being kidnapped. And now seeing that same child standing in front of him, that fear was back.

"Am I not allowed to worry?! Jungkookie I just don't want someone stealing you from us! I hate to say this but you don't have muscles anymore, you're small and defenseless. Sorry for being protective!" Jin said defensively.

"I never understood your fear of someone stealing me. You act like someone you know gets kidnapped everyday. Why do you think someone would steal me?" Jungkook truly never understood his hyungs worries.

Namjoon chimed in. "Jungkook just listen to him. Don't wander around alone, stay with one of us, okay?"

"Fine," Jungkook replied as he rolled his eyes.