Yongsun went to her office and informs her staff that she will be transferred to the Chairman's floor as the Vice President. Everyone was shocked by the sudden promotion of their boss, but they did not look down on her credentials since she represented Dahl Electronics well since the launch of the new line of products. She promised her staff that they will have a farewell dinner once she cleared her schedule. Yongsun is being helped by the security team to lessen the time she needs to transfer her things, it only took one trip and half a day to finish everything. She went to President Ahn's office and told her that she is done and they can talk about what she's going to do at her job. Hyejin discussed her duties and responsibilities but mainly she is in charge of the business side of Chairman Moon and Hyejin is in charge of the security and personal needs of Byul.  So she returned to her office to study everything when her phone rings.

"Hello, Kim Yongsun's office" Yongsun answered, she waited for a while because the line is silent

"This is Chairman Moon, please come to my office, ask President Ahn to help you enter" then the phone went off

'Hmmm why is she telling me to ask President Ahn for help, I have my fingerprint installed in her door already' Yongsun asks herself. She left and entered Chairman Moon's office since the guards saw that she is already cleared to enter, they informed President Ahn of the situation.

She saw Moon Byul looking at the window, her hair flows perfectly behind her, wearing a brown suit that is fitted beautifully at her form. Her mind was floating and she is just enthralled at the specimen in front of her.

"Chairman Moon" she called, Byul turned around looking at her longingly straight in the eyes. She felt something, the warm feeling came back, this is familiar and she only felt this once and it's because of...

"Moon Byul!?" Byul saw the shock in her eyes, now she knows that she remembered her

"Is that really you?" Byul just smiled, looking cute while rubbing her neck

"Awww cute!" Yongsun blurted out

"Yah! I'm not cute! I'm chic!" says Byul while glaring at Yongsun

"Aigoo, you're telling me that after you left me?" Byul relaxed

"You know I had too Yongsun-ssi" Byul suddenly became sad 

"Just call me Yong" Byul smiled cheekily

"Since you're older by 10 months, I will call you Unnie!" Yongsun smiled she never expected that the girl who confessed to her years ago is her boss and now the boss calls her unnie.

"I thought about you a lot after you left"

"Really? Why?"

"There is a lot of gossips when you left and you broke a lot of girls' hearts you know, I can't even tell them that you confess to me." Byul is surprised

"You should've told them, I don't mind"

"And who would've believed me huh? You left remember, I don't want to sound delusional"

"You're right, say unnie, you want to have dinner with me and Hyejin?" 'Is she asking me on a date?' she thought but she realized that Hyejin is coming with them

"Oh sure, I'd be happy too"

"Okay I'll ask Hyejin to book a restaurant, do you prefer anything?" Yongsun shakes her head

"No, anything would be fine"

"So we'll go out together later then, I will go to your office when I'm done" Yongsun stared at Byul, Byul doesn't know if she will hug Yongsun or not, so she settled with a handshake and Yongsun left her office.

Moon Byul is so excited for the dinner, she went inside the built-in room in her office, she basically has everything she needs in there as Hyejin make sure of that. She thought of having like a penthouse in her office so when she can't go back to the mansion, she can crash there to sleep. She washed up and changed her clothes, she called Hyejin and told her that she's ready and she'll be going to Yongsun's office. She was teased by Hyejin and joked about not going with them so that they can have time to talk, but Byul refused since she doesn't want to make Yongsun awkward.

Yongsun is still looking at the files when the door suddenly opened

"Unnie, let's go" Byul called from the door

"Oh, okay I'm hungry already" she stands up and fixes her things

Hyejin was also in the hallway so the three of them left the floor, they were surrounded by guards when they got to the lobby. Hyejin made them stop, talked on her in-ear to clear the car before they went in and drive to the restaurant. Yongsun was quite surprised with the security, she didn't expect it to be this tight, along the way Hyejin was talking about sweeping the place in front of the car. Byul sensed Yongsun was a bit distracted so she called the girl

"Unnie, you seem distracted, what's bothering you?" Yongsun looked at her

"I was just amazed at the security, they are so many and thorough"

"Well the board asked for it" They entered the car after the search, Hyejin went in front and the two of them sat at the back

"Aren't you comfortable?"

"Since I don't like talking to people, its actually for my advantage, so I didn't complain" 

"But you are talking to me, we just met after a long time" Yongsun reasoned

"Unnie, you're different, you know how I feel about you" Byul looked at the window embarrassed with what she said

"I never thought you would say something like that" Yongsun is getting flustered 

"Should I just drop the two of you at the restaurant?" Hyejin interrupted, the two of them smiled

"You're my personal bodyguard Hyejin-ah, what are you suppose to do?" Byul reminded her

They arrived at the restaurant, Byul and Yongsun sat side by side while Hyejin is in front then the three of them ordered their meals, Yongsun was amazed at Hyejin's appetite it's like she ordered the whole menu. 

"President Ahn, are you gonna finish all of that?" Yongsun's eyes are wide open in awe

"That's Hyejin for you, and yes I'm gonna finish it" she smiled while taking a spoonful of her food

"Hyejin eats a lot because she always works out and trains hard, she really loves martial arts, did you know that she won a gold medal at the Olympics?" Byul bragged her sister to Yongsun

"It's you?!" Yongsun was so dumbfounded, she couldn't imagine Hyejin being a martial artist. Byul was laughing so hard at her reaction that Yongsun started pouting. 

"Awww kiyoooo~" Byul cooed and press her finger at Yongsun's cheek, she slapped her hand off her cheek and Byul acted that it hurt too much. Then the guards started piling around Yongsun like she's some kind of threat, then Byul panicked

"Don't touch her!" she shouted while she hugged Yongsun tightly, when the guards saw what happened they dispersed immediately. Its already been a minute and Byul is still hugging Yongsun, Hyejin cleared

"I think they are gone," she said, Byul snapped out of her thoughts and let go of Yongsun immediately

"Uhm, sorry unnie" she said shyly

"I think I'm supposed to say sorry to cause this commotion," she said embarrassed

"Aigoo, I think I'm gonna throw up" Hyejin joked.

They talked a lot about the business, Byul and Hyejin started drafting the plans for the next tech to be released for their phone line, Yongsun was so immersed listening to them talk and plan, she admired Byul for her ideas that she throws at them, her mind is working overtime, it's like they are throwing ideas here and there although not yet concrete but its taking shape and for her it was amazing to witness.

"Unnie, are we boring you?" Byul asks Yongsun while she's eating her dessert 

"No, no. Actually I was very interested, your ideas are so out of the box, I think it will be revolutionary if we really are able to release it to the market" Yongsun explained, Byul was smiling at Yongsun like she's the whole world and Hyejin can't help but to laugh at her sister. Their night ended and they gave Yongsun a ride home since she left her car at the company. Byul went out along with the guards lining the building, Byul escorted Yongsun to her apartment while Hyejin went with them leaving the guards outside. 

"You don't have to accompany me Byul, this is too much," Yongsun said shyly

"I want to see you until you get home" Byul insisted. The three of them went up the elevator until they reach Yongsun's home.

"So this is my house, you want to come in for a while?" Yongsun offered

"No, you rest now unnie, we will meet tomorrow anyway, I will send a car to pick you up tomorrow for work" Yongsun is overwhelmed with Byuls' gestures that she doesn't know what to say

"I guess thank you is all I can say to you Byul," Yongsun said as sweetly as possible, Byul was so flustered her face is all red now. Hyejin can't take what she's seeing so she went to the elevator before she really throws up because of the sugar she's witnessing

"No problem, good night unnie" Byul said while scratching the back of her neck

"Good night too Byul" then Yongsun close the door, Byul is smiling weirdly while walking to the elevator where Hyejin is waiting

"Oh my god! What are you twelve?! it's like you're going through puberty again!" Hyejin grossed out

"Oh shut up!" Byul said still daydreaming

A/N: Thank you for supporting, so be prepared for a lot of fluff, since I've been depressed reading a lot of angst moonsun au that I rebutted with a lot of sweetness to ease my pain XD hope you don't get diabetes :)