"She's my younger sister. She's my younger sister. She's my younger sister". Chaeryeong repeatedly muttered while hitting her head continuously. She washed her face immediately and found herself staring at the mirror.

It's now Monday morning, meaning, they have classes today. Chaeryeong was the first one who woke up and just like the past few days, she was waking up with the view of Yuna's face. They've been sleeping with each other for two nights straight and Chaeryeong don't feel right with it now.

The first morning she was with the younger, it was different. Usually, her eyes will see the sun on the window glass when she wake up, but in the past two mornings, her eyes landed to Yuna's soft and innocent face. She's not complaining though. Yuna's face is better than the sun and it shines more than it. But in that two days, Chaeryeong realized something. The feeling that she used to feel when it comes to Yuna, wasn't the same anymore.

She used to see Yuna as her Younger sister, sibling or step-sister, but it was suddenly gone. It vanished. She don't see Yuna as her younger sister now. She do likes her as her step-sister. But now, it changed.

This time, She likes her , but Romantically.

Because of the strange feelings growing on her and the butterflies partying on her stomach when Yuna's with her, she couldn't stops herself from falling.

She tried. For almost a week with Yuna, she definitely found out her characteristic. The only thing she was scared of, is the habits of Yuna. Yuna sometimes, appears in front of her and will give her a hug. The younger will sometimes walk towards her and cling, give her a peck on her cheeks, a soft smile, and giggles.

Who wouldn't fall for that? Yuna is a type of person who's soft for everyone. But was different when it comes to Chaeryeong. Because she was softer and clingier when Chaeryeong was with her. With that, Chaeryeong really don't know how to escape from her anymore.

Chaeryeong took a deep sigh for the last time and shook away her thoughts. She went out of the bathroom and noticed that Yuna was still in dreamland. She walks towards the younger and gently tapped the woman's shoulder. "Yuna". She called but the younger just groaned and yawned in response.

"Come on, we classes today, remember?". She said that makes Yuna opens her sleepy eyes widely. Yuna's gaze turned to her and gave her a morning smile.

'I freaking know u'r cute but you have to get up now'.

"Good morning, Unnie". The sleepy voice was there but it was soft enough for Chaeryeong's ears.

"Good morning. Get up, we just have 40 minutes left". Chaeryeong threw a small smile and pulled down the blanket over the younger.

Yuna sat up, rubbing her eyes and did some arm stretching. "Do we really have classes today?". She asks innocently.

"It's Monday, so yes".

"...Fine". Yuna stood up off her bed and walks towards the older girl. She spreads her arms and leaned closer to Chaeryeong, wrapping her arms around the girl's waist and rested her chin on the woman's shoulder, enjoying the moment.

Chaeryeong froze again. The feeling she felt the first time Yuna gave her a morning hug was still there. It was the third time, but nothing changed. It still feels good.

"Now now, prepare yourself. 40 minutes remember?". Chaeryeong stated.

Yuna pulled away, smiling widely. "I'll take a bath".

"Don't you want to drink a coffee first?". Chaeryeong said. "We should eat breakfast first, yea?".

Yuna smiled. "We should".

Both of them then exited Chaeryeong's room and went straightly to the kitchen.

"Good morning, Jiyoon-ssi". Yuna greeted to the woman who have a tray of foods on her hands, preparing the breakfast of the two.

"Goodmorning, Yuna, Chaeryeong". She greeted back as she puts down and arranged the foods on the table. "Mr. Lee and Mrs. Shin left already. They said your allowance is at Miss Kwon. She will be here soon". The shorter woman added and the two nodded in unison.

"Why don't you eat with us, Jiyoon-ssi?". Chaeryeong stated when Jiyoon began to walk.

Jiyoon gave her a smile. "I'm okay, Chaeryeong. I still have work to do so, I'll get going now".

"Hmm, okay. If you want to eat, feel free to get food here". Chaeryeong said and Jiyoon nodded in response. With that, Jiyoon began to walk away and went to the garden.

"Unnie, who's Miss Kwon?". Yuna asks, slicing the bacon before biting it.

"My auntie". The older replied. Yuna nodded as both of them continued to eat .

"You're ready?". Chaeryeong asks, opening her car's door for Yuna.

"Kinda". The woman replied and entered the car.

Chaeryeong went to the other side and sat on the driver's seat. "Wear you seat belt". She said and the taller woman followed what she said. With that, Chaeryeong started the engine and drove away. Their university is just few blocks away from their house so it won't took a half hour to get there.

"Is this the University?". Yuna looked on the window, jaw dropped as she stared at the huge and wide school in front of them.

"It is, pretty huge right?". Chaeryeong replied, parking her car on the private parking lot. She rented that space every month and she already owned it.

"Let's go". Both of them went out of the car and went on the entrance. Chaeryeong hold Yuna's hand, surprising the younger but soon hold back Chaeryeong's. They entered the school and there's no much students there yet.

"Your room is 114- oh, there it is". Chaeryeong pointed the room and dragged the woman there.

There's only more than ten students there yet. "You're leaving?". Yuna asks as she pouted.

"My room is on the next floor. Room 157. If you need help, just calk me, okay?". The older said, reassuringly. "Go on your room now". She added and tapped Yuna's back.

Yuna smiled. "Okay, Unnie". With that, the taller girl entered her room, shocking the students inside.

"Dude, look at her".

"New student? She's so damn pretty".

"Look at that body, bro".

"Holy- dude, I'll get her".

Chaeryeong heard all of that. She don't know but her blood started to boil seeing those boys staring behind Yuna. They aren't looking at Yuna's face but obviously staring at the woman's body. That's it, Chaeryeong had enough. Those boys need to know who are they fantasizing.

Chaeryeong didn't think twice more and suddenly entered Yuna's room, her eyes were fixed at the perverts on Yuna's back.

"Unnie?".

Chaeryeong didn't response.

"What is Chaeryeong doing here?".

"Shut up, I wanna stare at her".

"Look who's here, isn't she your long-time crush?".

"Omg, Chaeryeong is so pretty today".

"She's always pretty, dumbass".

Chaeryeong's eyes didn't leave the men, causing them to stood up. "Chaeryeong-ah, Hyunjin is waiting you-".

"No one's asking. Now, I don't want you-". She paused, walking closer to the three boys. "Ugly-pervert- guys, to see staring at my younger sister again. Remember that". She coldly said, sending a glare to the three of them before walking away.

The students remained shocked, including Yuna and the three boys.

"Did she just said 'younger sister'?"

"She did".

"Both of them are pretty, anyways" .

"Did she just called us a pervert?".

"You heard it right, Felix".

"That woman, I hate her".

"Chaeryeong!". Hearing that voice, Chaeryeong walked faster. "Yah, are you avoiding me?". The guy unfortunately grabbed her arms and cornered her in the locker.

Chaeryeong groaned by the grip. "What are you doing? Can you please get away from me?". She said, glaring at the guy in front of her.

"I just missed you, baby. Don't you missed me?". The guy said, not daring to free Chaeryeong's arm. Chaeryeong's day was completely ruined now. First, she encountered those perverts, now him?

Chaeryeong tried to pushed him. "I told you I don't like you! Can you please leave me alone?". She yelled. Fortunately, there's no students in the hallway yet, so no one an hear them.

"No, I won't. Just freaking like me back!". The guy's voice also raised. He was gritting his teeth in madness. His grip also being tighter and it freaking hurts Chaeryeong.

"That's not gonna happen". With that, Chaeryeong slapped the guy's cheek using her free hand. The guy winced in pain but didn't let go of the woman. He hold his left cheek where Chaeryeong's palm landed and caress it, hoping it could lessen the pain.

Chaeryeong noticed the guy's hand. It has a wound and scratches all over it. She then looked up, turning her gaze to the man's face again, examining it until a realization hits her.

"Hyunjin". There was a cold tone on her voice that scares the said guy. Hyunjin faced her. Confusion could be read on his face as he puts down his hand. "Is it you?". Chaeryeong asks.

"What do you mean?". Hyunjin replied, raising her left eyebrow.

"The guy that night. Is it you?". She asks for the second time. It was possible that the guy and Hyunjin is the same. Chaeryeong is thinking that she was the one who made those wounds on Hyunjin's hand when she pushed him. He probably landed on something hard or sharp.

Even Hyunjin's height and glares were the same with that guy. If he was not wearing those mask that night, Chaeryeong could see his identity. But she was pretty sure that Hyunjin might be that guy.

Hyunjin remained silent for a moment but soon chuckled. "What are you saying?". He asks, acting so innocent. He moved closer to the woman and let go of Chaeryeong's arms.

"You're just giving me a reason to hate you more, Hyunjin". Chaeryeong said but the guy just smirked, putting his both hands on the locker, Chaeryeong's head in between. Completely pinning her.

"Whatever it is, Chae. You will be mine. Put that on your mind". He stated and kissed the woman's head. Chaeryeong remained on her position as Hyunjin walks away with his satisfied smirk.

Chaeryeong was frozen. She really don't know what to do. She wanted to escape from Hyunjin but she can't. The guy is powerful. What Hyunjin want, Hyunjin gets. And it freaking annoyed Chaeryeong.

The only thing on her mind right now, is to find an evidence that will complete her theories. She knows it could be Hyunjin. So for now, she will start to monitor every single move of him.

___

Sorry for the errors, will edit this tomorrow, i guess. also i love skz sm especially hyunjin lol i think i have to involve them here haha

A vote is appreciated-,-