Elsa couldn't sleep. She glanced at the alarm-clock on her bedside table and noticed that it was already midnight. The blonde had been tossing and turning in her king-sized bed for an hour and a half already. Tomorrow, she would begin her last year in high-school. And, as with every time before she goes back to school, her mind couldn't rest.

Will I be in the same class as Olaf? I hope so... maybe Rapunzel will be there too... I hope we won't have Mr. Weselton in mathematics!

Elsa's mind kept on wandering around until she heard her door open quietly and saw a small ray of light invading her room. She easily recognized her little sister's petite silhouette leaning against the door frame. She seemed hesitant, but softly asked "Hey sis... are you sleeping...?"

Elsa smiled at the question and answered: "No... my mind won't let me." and waited for the question she was sure Anna would ask next.

"Can I come in? I can't sleep either." Anna didn't wait for her sister's answer and came into the room before quietly closing the door.

"Of course. Just hop in!" Elsa tried to ignore the guilt she began to feel in the back of her head and lifted the covers so that the redhead could get in. She noticed, thanks to the dim light coming through the curtains that Anna was clad in the big blue T-shirt she used as her pajamas. This T-shirt had actually originally belonged to Elsa, but she had given it to her sister when it became too small for her. Anna looked really cute in it. She was smaller than Elsa, so the t-shirt almost reached her knees.

Cute? Stop! Don't think about it! Conceal, don't feel! She kept repeating her mantra as Anna slowly made herself comfortable in the bed, snuggling against her big sister. She rested her head on Elsa's shoulder and put an arm around her waist before speaking up. "So? What were you thinking about? School?"

If only...I wish school was my sole concern. "Yeah... well, you know me, I never sleep well the night before school starts. What about you? What's the problem?". Elsa was painfully aware of her sister's breath against her neck.

Anna raised her head a little and smiled before answering: "Who said anything about a problem? Maybe I just wanted to cuddle!" She giggled a bit before speaking again, seriously this time. "Same for me actually... I really wished the summer holidays would never end!".

Elsa was actually glad the holidays were over. It had been... difficult... to spend two whole months at home with her sister without any other distractions. Especially when their parents had agreed (after a lot of convincing from Anna) to buy and set up an above pool in their backyard garden. From that moment on, Anna had spent way too much time in a bikini for Elsa's comfort. Her sickness, as she called it in her mind, had spoiled her holidays. Only one more year, and then it will be over. You'll be away from her, and you will heal.

"Well, it couldn't last forever. You'll have to study hard this year. Next step is high-school."

Anna waited a few minutes before talking again, and Elsa could hear the sadness in her voice.

"But when I'm in high-school, you'll go to college... It would have been so great to be in high-school together! And if you don't go to the nearest university, I won't even see you in the morning and the evening." Anna waited a bit before continuing. "Do you know that this may be the last year we spend together?"

Oh, yes, I do. The blonde finally understood what really bothered the young girl and tried to comfort her. "Shhh... don't think about that. We've got a whole year together! Let's focus on enjoying it okay?"

"I know... you're right. And I shouldn't be so selfish. I love you sis."

Elsa could feel her heart skip a beat but tried to ignore it. "I love you too Anna." She kissed her on her forehead before wishing her good night. A small smile appeared on Anna's lips and she fell asleep a few minutes later.

But Elsa's mind was not so easily put to rest. Her sister's petite body against hers kept reminding her of her sickness so she tried to think about anything else that she could. That's how she began thinking about her life up until now.

Elsa had always been a decent person, a good daughter and an amazing student. Her parents, Agnarr and Iduna, loved her and were very proud of her. She was hardworking and actually loved learning, especially science. She had two really good friends, Olaf and Rapunzel. There was also Flynn who was currently dating Rapunzel. And, she had an amazing sister... but that was part of her problem.

She had always loved Anna. They had always been inseparable and they did everything together when they were kids. But two years ago, when her sister had turned 13, she had begin to feel some... unwanted feelings. It was rather innocent at first, but as her little sister grew up, Elsa had noticed that she often looked at Anna in a way that was definitely not sisterly. She noticed how big Anna's beautiful green eyes were, how soft her red lips looked, how cute her freckles were, how feminine her body was becoming... Stop it you sick perv! She's your sister for god's sake... And she's only fifteen...

She had realized something this summer, she was attracted to her sister. She was in love with her. She was sick and she needed to get better. At her worst moments, she had even considered telling it to someone. Maybe she needed help. Medical help. But then, she had come up with a plan. She was only one year away from college. She only needed to register to a college far, far away and hold on for one year.

Yes, it will be okay. Just one year. Your stupid feelings will go away if you're separated from her. Conceal, don't feel.

The older girl had almost convinced herself that it was going to be fine when Anna shifted a little and gently moved her hand over her sister's stomach.

God, it's going to be so hard.

Notes :

This is the newest version of this story, with Striga proofreading it! It was my first fic and English is not my native language so there were quite a few errors and mistakes. All the author's notes have been removed too, to provide a more comfortable read.

Just a reminder that I'm French, and I didn't want to write about things I don't really know of, so you can expect a few differences compared to the usual American setting. The school system is different, as well as a few laws and cultural aspects.