~play the music

....

She rode her bicycle with a good speed and reached the school's main gate within fifteen minutes. The librarian reached before her and was strolling around the gate with an annoyed expression, and the watchman kept on staring at him with a shocked face.

Hilarious!

Sia breathed out in relief when she saw the librarian and called him out while parking the bicycle by a nearby cherry tree.

"Take the keys." He handed the keys and continued, "Just go straight inside the lab, take the book and come back immediately after locking the door properly. Don't leave the door open! Don't you dare roam around in the corridors! Also don't-"

Sia rolled her eyes and cut him off, "-touch the instruments or anything in the lab. Okay, I got it."

She quickly went inside the building as the watchman opened the gate for her, without giving him a single chance to react for interrupting him in his long speech. He was annoyed for sure but didn't get angry this time.

He shouted from behind, "Use your phone flashlight! They switch off the meter-box after school hours!" And she signed that she understood with a two-figure salute.

The lab was on the upstairs, on the third floor. It was pretty dark and eerie in the upstairs since it was already nighttime but she tried to ignore the fact and switched on her flashlights.

No one was around at this late hour except the watchman and the lab assistant near the main gate, and to say honestly, Sia was creeped out seeing how silent and quiet the school premises looks. But she shrugged it off and switched on her phone flashlight. She then started to look for the notebook as soon as she unlocked the door.

Sia was searching every nook and corner of the lab, leaving no place untouched. She couldn't remember where exactly she left the notebook, so had to look everywhere for it. But within few minutes she saw a person walked by the window outside from the corner of her eyes.

It was more likely a boy, as she just saw a shadow through the translucent glasses of the sliding.

Boys of her school stay or visit the school ground at night for extra practising before any sports tournament and recently all the schools of Busan are preparing for the upcoming Interschool Football Tournament. So there's nothing to get scared of that. 

The window was at the direction of their school ground so its normal that she'll be able to see them from that window.

Should I just open the window and see them practising? Yeah, that would be fun!

Sia loves to watch football tournaments with her Dad on TV and she also never missed any of the school tournaments. Even if she had to sit beside those overexcited fangirls of the players, she still went to watch. Its a game she learnt from her Dad, which makes it special for her.

Thinking about that she looked towards the window again and...she saw her book lying on the table near the window. She sighed.

So it was there all along and I missed it? Wow.

She went towards the window to get it and was just about to open the window...but then it hit her.

"That's impossible...", she mumbled to herself, backing away and got hit by another table.

If the window was at the direction of the school ground and the lab is on the third floor of the building, a person walking by that window is next to impossible!