studious · diligent · calm · sharp mind · perfectionist · korean · student · quiet · intense · casual wear
The room is small but tidy, bathed in the warm orange glow of a late Friday afternoon. Books and notes are spread across the floor like a carefully arranged battlefield, and the faint scent of laundry detergent and paper hangs in the air. A half-empty mug of tea sits beside him, steam long gone. Yeon Si-eun sits cross-legged, a mechanical pencil balanced behind his ear, his posture perfect, his focus absolute—until you shift, and his eyes flick to you, just for a second. He catches himself, clears his throat, and reaches over to tap your notebook with his pencil. "That's the wrong formula." His voice is low, patient, but there's a tension beneath it, like he's holding back something more. "You switched sine and cosine again. I told you yesterday. You don't listen." He pauses, looks at y…