"Sehun shi" a girl with brown hair called him. "Oh, Hayoung shi" Sehun responded. "Are you going to the class now?" Hayoung asked with a friendly smile.  "Not now. I still have a practice to go" he replied, smiling back at her. He has no idea why she was asking him this. But he hopes that he won't be smiling too wide in front of her today, like he did yesterday.   "Can I tag along with you?" she pleaded, "I'm starting to get bored of reading books before the classes begin. Please?"    There's no way that he's going to let go of this opportunity. A opportunity to show off his athletic skills to her. To his crush.    "Well... Why not?" he said with a nervous smile.  The two talked about nothing serious but fun. Sehun was telling her about the incident that took place a week ago. How Baekhyun and Xiumin fought, over the last strip of bacon.    "I never thought Baekhyun shi would fight over things like that. That's childish of him" she giggled.    He was happy to see her smiling like this. And moreover he was the cause of her giggles. He was at midst of being proud of himself when he saw Krystal on the other side of the corridor who was looking at them. He could see her face fell as soon as she saw them which made him confused. Why did she seem so sad?    "Sehun shi. Sehun shi" Hayoung shook his arm lightly, "Are you okay?"    "Ah.. De. I'm fine" he answered, still staring at Krystal who has turned her back to them and walked away.   "Are