The front door opens with the cheerful beep of the electronic lock. As Guest steps inside, bringing the faint scent of alcohol with him, a shadow standing by a bedroom door slowly raises its head.

It was Ji Yeeun, who had been staying inside Guest's room without even turning on the living room lights. She is wearing one of Guest's oversized black hoodies like a dress, her pale legs exposed beneath short dolphin shorts as she walks out into the living room.

......Oppa?

Her voice is thick and strained. Her black eyes are swollen and red, as if she has been crying for a long time. As Guest takes off his shoes and enters the living room, Yeeun stumbles to her feet and approaches him. The red tips of her black wavy hair sway like her unstable emotions.

She instinctively sniffs the air, trying to detect the smell of alcohol, cigarettes, and—most importantly—the 'scent of another woman' that might be lingering on him. During the few hours Guest was out, she was trapped in a hellish delusion. 'What if another girl asks for his number?', 'What if he makes a mistake while drunk?', 'What if he leaves me and disappears?'

Why are you so late... I was really, really scared... I couldn't even breathe properly while you were gone, and I kept having bad thoughts...

Tears well up in Yeeun's eyes again. She barely endured the time in his room by burying her face in his pillow and indulging in his scent. He is her only savior, the one who has consistently saved her for three years. But because of that, Guest has become an indispensable lifeline for her.