Monday came around and you had butterflies in your stomach as you walked into your math class. Mr.Choi was writing an overview of today's lesson on the board. He smiled when he saw you. "Good morning, (y/n)." You bowed your head slightly. "Good morning, Mr.Choi." You took your seat next to your friend and she just looked at you. "I saw that." She said. "Saw what?" You asked. "I saw how he greeted you." "He tells everyone good morning." "Not like that. I saw the way he smiled at you." You brushed her off. "Oh cut it out. It was nothing." You said. You didn't tell her about the date you had with Siwon because you didn't want anyone finding out. Your guiltless came back, but you didn't say anything. Throughout the lesson, Mr.Choi kept smiling and making eye contact with you. During silent work time, Mr.Choi called you to his desk. "Yes, Mr.Choi?" You whispered.  "The principal e-mailed me saying that we are getting a new student in this class and she wants you to show him around. He's in the office and she wants you to go right now." He said. You nodded. You left the room and went to the principal's office. You knocked on the door and heard to come in. Fixing your uniform, you opened the door and saw a boy sitting in the chair facing the principal. "(Y/n), this is Oh Sehun, please show him around then return to class with him." You nodded and left the office with Sehun. "I'm (y/n), nice to meet you Sehun." You said. He returned the greeting and followed you around as you showed him what was what and where his classes were. You were talking and you found out that be had a boyfriend, Luhan, who goes to his old school who he still sees. When you returned to class, Mr.Choi put him on the other side of you, considering it was the only empty desk. You didn't really understand the assignment so you went to Mr.Choi "What do you need, (y/n)?" He asked. "Can you still tutor me after school today?" You asked. He smiled. "Of course, but it will have to be at my house." You raised your eyebrows. "Why?" "Well, my dog is sick and I need to get home to take care of him." You thought for a minute. "O-okay." You went back to your seat and started packing your things since class was almost over. After school, you were on your way to the library when that same girl from your math class stopped you. "Don't get to close to Sehun. He's mine, I'm not letting you get him." You rolled your eyes and walked around her. "He has a boyfriend." You said. She scoffed and yanked your hair, you whipped around and saw her smirking. "You're just saying that because you don't want me to have him." She said. You wanted to charge at her, but class presidents are more mature than that. "I'm going to pretend that didn't happen." You said, calmly. "Are you scared?" She asked. "No, I refuse to stoop to your level." She gasped and went to push you, but something solid stood infront of you. "That's enough." Mr.Choi said. The girl panicked. "It's not what it looks like-" "Detention, tomorrow, Mrs.Jung's room. I'll let her know you're coming." She sighed deeply and walked away. Mr.Choi turned to you. "Are you okay? She pulled your hair pretty hard." He rubbed the spot where your hair was pulled and you blushed and looked down. "I'm fine." You said. He smiled. "There you go, blushing again." He said quietly. You laughed nervously and started walking to the his car with you trailing behind him. "Did you take your car to school today?" He asked, opening the door for you. "No, my car was having problems so I rode with a friend." You said. "Good, now I can take you home." You got to his house and saw how clean and well-kept it was. "We'll be woking over here." He said, pointing to the dining room table. You sat in the chair and pulled your books out. "Where's your dog?" You asked. He looked at you and laughed. "I don't have a dog." He said. "B-but, why-" "I said that so you would come over." He said. You were a little dumbfounded and he just laughed. The tutoring session was agonizing. You couldn't focus at all at what Mr.Choi was saying because everytime he spoke, all you could do was stare at his lips, oblivious to the words coming out. He noticed your absent-minded stare and smirked. "(Y/n), do we need to take a break?" He asked. You looked at his eyes which had suddenly become intense as he studied your face. "N-no. Keep going." You said. He chuckled softy and closed the books. "We can pick this back up tomorrow. Right now, I have something better on my mind." He grabbed your chin and tilted yout head up. Your eyes widened and you felt his warm lips pressed to yours. You froze and he pulled away. A sudden jolt of confidence took over your body. "I didn't tell you to stop." You said. He smirked at your boldness and kissed your again. Somehow, you ended up on the couch with him hovering over you, still kissing. Your blazer was tossed on the floor somewhere and he started unbuttoning your shirt. You quickly grabbed his hand. "What is it?" He asked. "I'm not ready." You said. Your positions remained for a second then he got off of you. "I understand. I'm sorry." He said. You shook your head and sat up. "No, I-I liked it." You said, quietly. He smiled and patted your head. "I should get you home." You told him your address and it was no suprise you didn't see your parents cars. "I'll see you tomorrow, (y/n)." You nodded once and went to get out, but he pulled you back and kissed your forehead.  "Make sure you get some sleep tonight." He said. "I will." Later that night, you laid in your bed, unable to sleep. The thought of what you're doing with your teacher, behing closed doors, it was exciting. You wonder, though, how long you could keep this up without getting caught.