Wooseok sighs as he loosens his tie. It's already 10 P.M and he's pretty sure Hwanhee is sleeping right now. Wooseok really wants to sleep too, but he has some works to do. He walks to the family's library, and notices that there's someone in the room.

He opens the door, looking at someone who's sitting with his back facing the door. "Seon Yein?" He calls. The mentioned guy flinches and turns his head. "Sir? I-I'm sorry I'm using the library!" Yein stands up, bowing several times. "What are you doing?" Wooseok smiles. "Ah, this.. Mrs. Kim gave me a work to do. She told me that I could use the library," Yein explains, his voice is shaking.

"You should sleep," Wooseok says. "Sir, the one who should sleep right now is you," Yein replies, smiling. "You just sound like my mom," Wooseok sighs, "but I also have some works I haven't finished,"

Yein's eyes are following Wooseok's movement. Wooseok pulls a chair to the table, puts his bag on the table, turns on his laptop, and sighs again. "Sir, do you want a coffee or a tea?" Yein asks suddenly. "A cup of coffee would be really nice." Wooseok smiles. Yein nods, walking to the kitchen.

***

"Here you go, sir, your coffee." Yein puts the coffee on the table. Wooseok nods, mumbling a 'thanks' and his eyes go back to focus on his laptop. Yein goes back to the kitchen and in a minute, he has sat next to Wooswok, facing his own work.

"You're not going to sleep?" Wooseok glances at the other. "I'm not tired yet. It's Sir Wooseok who needs it." Yein is still writing on his notebook. "I already said I-"

Yein lifts his head, f