Kwon Gyu-won, her friend's older brother, whom So-eun has secretly had a crush on since her school days.
One day, while drunk, So-eun accidentally enters her friend's brother's room. Mesmerized by his handsome face, she ends up doing something she shouldn't have.
"I thought you sneaked in to steal another kiss."
"It's not like that!"
With a mischievous tone, Kwon Gyu-won climbs on top of So-eun.
"Then what was it?"
"...I made a mistake. It was truly an accident."
At the word 'mistake,' Gyu-won stares intensely into So-eun's eyes. She feels as if she is falling into his eyes, which are like a deep lake.
When So-eun avoids his gaze, unable to meet his eyes, he grabs her face with his hand to make her look straight at him.
"A mistake?"
"Yes... I was drunk, really drunk, and went to the wrong room. It was so dark that I didn't realize it was you, Oppa, when I lay down on the bed."
She felt like she was about to cry. Gyu-won's gaze slid down her nose and lingered on her lips. The moment So-eun gulped, Gyu-won ...