Because of her older brother's overprotectiveness, Hayan couldn't freely join even a company dinner, let alone a casual drinking gathering. Then one day, when her brother was away on a business trip and her parents were traveling abroad, her team, which usually held lunch gatherings, scheduled a dinner party. Overjoyed, Hayan drank to her heart’s content until she was completely wasted. When she came to her senses, she found herself looking at her team leader, Hyunwoo, half naked. And for some reason, what was attached to his body looked just like that. At that moment, she decided she wouldn’t let this once in a lifetime opportunity slip away.