Tailed Demons. Demons who has tails and are a rare specimen of Demons. There are only 9 of them. Tailed Demons cannot die, they can only be sealed for 10 years and then come back alive again. No one has catched the 9 Tailed Demons... Yet. 4 girls and 5 boys. All are strong and good at hiding their own self from the humans. Will they be able to hide further more?

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A/N: This'll be a love triangle between the main characters, Choi Seojung, Choi Yuna (Yuju) and of course Jeon Jungkook. And lil' bit of Jin x Sowon and Jin x Yerin and also a lot of Jin x Seojung~!! Enjoy~~!! And oh, also a bit of Jungkook x Eunha (my GFRIEND x BTS OTP ❤️)

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"Jeon Jungkook-ssi, i am leaving Choi Seojung-ssi's care on your hands." One of the Elite (and he's the strongest of them all) Demon Sealers, Choi Siwon, said.

"C-Choi Seojung...?" Jungkook asked.

"Yes, is there a problem?" Siwon asked.

"N-No! Not at all, sir. I'll take care of her well." Jungkook said, looking at the black haired girl beside Siwon. The girl had attractive sepia eyes and her black locks were shining.

"Good. Oh, Choi Yuna-ssi is coming home today. She'll introduce you clearly to Seojung-ssi." Siwon said and walked away.

"Yes, sir..." Jungkook said and turned to Seojung.

"What the heck are you doing here??" Jungkook asked.

"I was kinda looking for your sloppy ass, oppa." Seojung said.

"Sloppy-- Kid, did you just joined the squad?" Jungkook asked.

"Yes, i did." Seojung said.

"Are you THAT crazy?! You can't handle the situations here!" Jungkook yelled.

"I'm 15 now, oppa. I can take care of myself just as much as you can." Seojung said.

"*sigh* Whatever. You're a junior right? What a bummer." Jungkook said and handed Seojung a blue card.

"What is this for?" Seojung asked.

"When you're in a bad situation, that'll go shining and i'll come running to you. Don't throw that away." Jungkook said.

"You really don't trust me do you? Fine, fine. I won't throw this away." Seojung said.

"Jeon Jungkook-ssi." A tall girl called. Seojung looked behind Jungkook and saw a girl with bangs. Jungkook turned around and smiled.

"Yuna-ssi." Jungkook said.

"I told you to call me 'Yuju'. And oh, hi there Seojung-ssi." The girl said.

"Yuna-sunbae. Nice to meet you." Seojung said.

"Ah don't call me 'sunbae' we're both juniors. Except that i'm gonna be promoting to be a senior." Yuju said.

"Oh, okay then." Seojung said.

"Yuju-ssi, you don't need to tell me anything about Seojung. I already know her." Jungkook said.

"That's a relief then. I'll go now." Yuju said and walked away. Jungkook turned to Seojung with a warm smile.

"You know who Kim Seok Jin-hyung is, right?" Jungkook asked.

"Uh-huh." Seojung said, looking at her watch.

"Give these to him." Jungkook said and handed two brown envelopes to Seojung.

"Where is he anyway?" Seojung asked.

"Probably in his cubicle in Floor 5. I'll go to the Committee Office and meet up with you at lunch." Jungkook said and walked away.

'He looked like he was in a hurry.' Seojung thought and went to the elevator. The elevator doors opened and it revealed Yuju.

"Oh, Seojung-ssi. Where are you going?" Yuju asked.

"Just in Floor 5. I'm gonna give this to Kim Seok Jin-sunbae." Seojung said and entered the elevator.

"Okay then." Yuju said as the elevator doors had closed. It was a quiet and slow 'ride' for Yuju but not for Seojung. Suddenly, the elevator started shaking and the lights started to flicker.

"Okay we're going to be stuck." Seojung said and grabbed Yuju's wrist.

"What are you--" Yuju was cutted off when Seojung kicked the door open and jump out of the elevator.

"Waahh!! Seojung-ssi what were you thinking?!" Yuju yelled. Seojung took out a knife and pressed it tightly to the tiled floor of Floor 5.

"Yuju-ssi? Choi Seojung-ssi...?" One of the Elite Demon Sealers, Kim Heechul, said.

"We almost got stuck on the elevator so i did this." Seojung said. Yuju jumped to the floor by the help of Seojung and Heechul. Seojung also followed after that. Seojung grabbed the knife and looked at the handle. Golden handle.

'This knife...' Seojung thought.

*Flashback*

"Junghyun-oppa...? What is this knife for?" 6 year old Seojung asked Jungkook's brother, Junghyun.

"Mom and dad said this was given by your parents, Seojung-ah." Junghyun said.

"Parents...?" Seojung asked.

"Yes, Seojung-ah." Junghyun said and patted Seojung's head.

"You have a family you know." Junghyun said and smiled.

"I-I know... Are they dead?" Seojung asked.

"I don't know but they're current status are written as 'missing'." Junghyun said, making Seojung frown sadly.

"*smiles* Don't worry Seojung-ah. Me and your Jungkook-oppa are here for you. Mom and dad too. We're all here for you." Junghyun said.

"T-Thank you, oppa." Seojung said.

*End Of Flashback*

"Seojung-ssi...? Is something wrong?" Yuju asked.

"No. Nothing." Seojung said and placed back the knife at her waist.

"You've been staring at that knife for a while." Yuju said.

"It's nothing. I'll go now." Seojung said and walked away. Finding a brown haired boy, she immediately walked to the cubicle.

"Excuse me... Kim Seok Jin-sunbae?" Seojung asked. The boy turned around and smiled at Seojung.

"Yes? Oh! Choi Seojung-ssi!" Seokjin yelled.

"Jungkook-oppa told me to give these to you." Seojung said and handed Seokjin the two envelopes.

"Oh, thank you so much. Are you friends with Jungkook-ssi?" Seokjin asked.

"Yes. His family adopted me when i was only a newborn baby." Seojung said.

"I see. You can go now." Seokjin said.

"Seokjin-ssi, she doesn't know her cubicle yet." One of the Elite Demon Sealers, Tiffany Hwang, said.

"She doesn't?" Seokjin asked.

"Yes, she doesn't." Tiffany said.

"Seojung-ssi your cubicle is on the end of this row." Seokjin yelled, pointing at the last cubicle of the row.

"Oh, i see. Thank you, Seokjin-sunbae and Tiffany-sunbae." Seojung said.

"No problem kid." Tiffany and Seokjin said. Seojung nodded and walked away.

"Okay great. How am i supposed to go down now? No elevators and... No stairs?" Seojung asked.

"I guess you have to jump." An Elite named Ryeowook said.

"Really? Okay then. See you Ryeowook-sunbae." Seojung said and jump down.

"Wait! I was only kidding!" Ryeowook yelled.

"*sigh* Hyung, please." Another Elite named Kyuhyun said.

"I didn't meant to." Ryeowook said. Seojung tied a rope around her knife handle and threw the knife on the ground floor's tiled floor.

"Okay." Seojung said and grabbed the rope, sliding down and landing safely on the ground. She untied the rope and hid her knife in her waist.

"Wow, you're awesome." A junior named Kim Sojung or better known as Sowon, said.

"Thank you." Seojung said. Sowon looked at Seojung and smiled.

"What's your height?" Sowon asked.

'Bruh.' Seojung thought.

"164cm." Seojung said.

"Wow, you're pretty tall for a 15 year old. You're taller than Eunha, a 19 year old." Sowon said and chuckled.

"I heard that." Jung Eunbi or better known as Eunha, said. She was behind Sowon.

"Eunha-yah~ What's for lunch~??" Sowon asked.

"Ugh. Sandwich." Eunha said.

"Yay. Cooked by my Eunha." Sowon said with a goofy smile.

"Ahh, lovers." Seojung teased and walked away.

"We are NOT lovers, newbie!" Eunha yelled while blushing.

"Oh yes we are~!" Sowon said to Eunha.

"(-3-) Na neo sirheo!" Eunha yelled and walked away. She said 'I hate you'.

"Love you too, baby~!" Sowon yelled.

[ At Seojung ]

Seojung was just sitting on a chair beside the Committee Office's door room.

"Oneul buteo urineul~" Someone quietly sang but Seojung heard it. The girl was obviously sitting beside Seojung.

'Hmmmm... Kim Yewon a.k.a Umji... A junior.' Seojung thought.

"Umji-yah~! Wanna play hockey after our mission later on??" Jung Yerin, another junior, asked. Umji removed her earbuds and nodded with a smile.

"Sure, unnie." Umji said.

"Yerin-unnie, Umji-yah, Yuju-unnie wants to see us after your hockey later on." Hwang Eunbi or called as SinB, said.

"Oh yeah, sure." Yerin said.

"Oh, and who are you?" SinB asked Seojung.

"Choi--"

"Leeet's go now, newbie." Jungkook said and dragged away Seojung.

"Huh?" The three girls asked.

'Choi...? Newbie? Oh! Choi Seojung!' SinB thought.

"Choi Seojung!!" SinB yelled and chased after Jungkook and Seojung.

"No running around the slippery floor please~!" Kim So Hyun, a junior, yelled.

"Sorry!" SinB yelled. Seojung and Jungkook turned around and raised an eyebrow. SinB slipped buuuut someone catched her in time.

"You should've listened to Sohyun-ssi's warning." Sunyoul, another junior who's promoting to be a senior, said.

"S-Sunyoul-ssi... Thank you." SinB said. Seojung turned around and saw Jin and Yuju.

"Hi." Jin said.

"Let's go eat lunch now." Yuju said and quickly dragged away Jungkook, Jin, and Seojung.

"Yah! Unnie! I need to talk to the newbie!" SinB yelled.

'What the heck is going on?' Seojung thought.

'Ah she'll get used to it.' Jungkook thought with a smile.

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9 Tailed Demon - Okami (nickname) (means; wolf)

8 Tailed Demon - Karasu (nickname) (means; crow)

7 Tailed Demon - Tori (nickname) (means; bird)

6 Tailed Demon - Kyuketsuki (nickname) (means; vampire)

5 Tailed Demon - Komori (nickname) (means; bat)

4 Tailed Demon - Shi (nickname) (means; death)

3 Tailed Demon - Mahotsukai (nickname) (means; mage)

2 Tailed Demon - Shinigami (nickname) (means; death god)

1 Tailed Demon - Kage (nickname) (means; shadow)

Will the Commission of Counter Demons catch all of these violent monsters??