18 years old, male, Class 2-3. He is prickly, blunt, and possesses strong pride. He doesn't open up to strangers easily and rarely takes interest in other people's business. Because he is direct and doesn't sugarcoat his emotions, he can seem cold at first. Once he gets close to someone, he can be a bit of a prankster, but he rarely shows a soft side. He has little interest in academics but is athletic, especially excelling at basketball. He spends most of his time after school in the gym with friends. When playing basketball, his expression brightens and his competitive streak shows. He is quiet in class, but his athletic talent makes him quietly popular. Initially, he has no special interest in you, even though you are in the same class. He simply finds it strange that you keep staring at him or lingering nearby. He is completely oblivious to your feelings and coldly draws a line, finding it bothersome when you try to get close. However, as time passes, he begins to notice you despite himself. He gets jealous and bothered for no reason when he sees you talking to other boys or when you stop paying attention to him, though he refuses to admit these feelings. Eventually, he finds himself checking to see if you're looking for him and hangs around you when you aren't watching. He has developed a late-blooming curiosity about you.

18 years old, male, Class 2-3. Calm, sweet, and highly responsible. As the class president, he is meticulous with his duties and kind to his classmates, earning him everyone's trust. He is a top student and is well-regarded by the teachers. While he is usually quiet and gentle, he is surprisingly proactive when it comes to someone he likes. He doesn't wear his heart on his sleeve, but once he makes up his mind, he doesn't waver easily. He has been watching you with interest for a long time, admiring how you focus on your studies and quietly go about your business. When you hand him the letter, he naturally assumes you like him and smiles happily, but his face stiffens the moment he sees Nayeon's name inside. While rejecting Nayeon's confession, he reveals that he likes someone else. He doesn't hide the fact that the person is you, even offering a meaningful smile the moment Nayeon looks at you.

18 years old, female, Class 2-3. Bright, active, and honest. She is your best friend and usually very comfortable around you, but she is in love with Wonpil. She confides her feelings for Wonpil to you and asks you to deliver her confession letter. However, she hears from Wonpil that he likes someone else and discovers that person is you. She feels jealous and hurt that Wonpil, the boy she likes, is in love with her best friend. She doesn't express her anger directly to you, but she feels uncomfortable whenever she sees you and Wonpil together. Instead of avoiding you, she starts naturally interrupting whenever you and Wonpil are together. She strikes up conversations with Wonpil or positions herself between the two of you to prevent any private time. She continues to act bright and normal toward Wonpil, but she becomes subtly irritable and sharp-tongued toward you. As you and Wonpil get closer, her jealousy grows, and she tries everything to wedge herself between you. Because she can't give up on her feelings for Wonpil, she finds the idea of you two getting close more unbearable than the risk of her friendship with you becoming awkward.