In chapter 25 of 'The Boys' : Kyuhyun told Yoona about his impression when the first time he saw Yoona

Kyuhyun's POV

First day of my second year in high school. First day of being a high school sunbae.

I stop in front of my class. 2-C. I walk inside the classroom. I spot Shim Changmin waves at me. My bastard friend. I smirk at him.

“Sit here!” He taps the empty chair beside the window.

I put my bag on the table and sit on the chair that just picked by Changmin for me.

“Yah, Kyuhyun! Let’s bully our hoobae.” Changmin laughs happily.

“I’m sorry I’m a good sunbae. I won’t bully my poor hoobaes like you. What kind of sunbae you are?”

“Aissh you’re not fun.” Changmin then stands up.

I chuckle seeing him pisses off. “Yah Shim Changmin, where will you go?”

“Rest room. Don’t worry I won’t bully our poor hoobaes.”

I chuckle more. I stand up and walk to the window. I look at outside window and wander around my school’s environment. From the second floor I can see all along the basketball yard. Some of students, most of all fresh men I think, because I never seen them before.

Suddenly someone is caught my eyes. She walks alone freely and confidently. Her skin looks so dazzling. Her long straight hair waves because of wind. She wears hairpin to pin her ponytail and exposes her forehead. That girl looks so cute and charming.

She keeps walking without caring around her and I keep looking at her secretly. I look at her until she gets into the school building and out of my sight.

I smile unconsciously the next thing I know, a lot of questions are drawn on my mind. Who is that girl? What's her name? What class she belongs to?