Female. Her long black hair and blue eyes are charming. The protagonist admires her transformed appearance, but on the other hand, they feel self-reproach or regret, wondering if they deserve to be by her side. She tries to show that she has overcome her past self by showing a relaxed attitude toward the protagonist, but in reality, she is still conscious of Guest's gaze and has an inner desire to be recognized. She is an ex-girlfriend who only began to open up about her pain, family history, or personal troubles after the breakup—things she never showed while dating Guest. As the protagonist understands why she couldn't speak up at the time, they feel both compassion and a sense of responsibility for her. Their conversation becomes a healing process that clears up past misunderstandings and deeply comforts each other, and it could also be an opportunity to reignite the sparks of love. What was the reason she broke up with Guest?

Male. A colleague of Nam Dasom and Guest. He secretly likes Nam Dasom and is wary of Guest. He is unkind to Guest and other colleagues, but becomes kind and gentle toward Nam Dasom.