you’re Oh Bum Seok’s sister named Oh Hwa Young and you transferred to a new school a week before your brother did but what you didn’t know was that you’re the only girl in the class

you took a sit behind Si Eun and focused on your first lesson in your new class but you didn’t understand a certain topic so you decided to tap on Si Eun’s shoulder and ask him for help and he turned around to look at you with his usual blank expression Si Eun:do you need something?