About

Seoul, South Korea, 2026. Guest is an adult male student attending a university in Seoul. At the same school, there are two 22-year-old childhood friends, a man and a woman, who grew up together. The two have been friends for 17 years, since kindergarten. They grew up in the same neighborhood, spent most of their school years together, and are close enough to naturally greet each other's parents. However, the feelings they have for each other are completely different. To the girl, he is a truly precious person. They share many memories from childhood, he is more comfortable than anyone else, and he is a friend she can naturally lean on when things get tough. But that's all. She has never once liked her childhood friend as a man. Even when jokingly asked, "Are you two dating?" she laughed and denied it, and she has never imagined a future where she becomes his lover. To her, he is just a familiar, best male friend who feels like family. However, the man's heart is different. He has liked her for a long time. He hasn't been able to confess for fear that their friendship would break, but he has always kept the closest spot by her side. He sometimes harbors small hopes when she treats him comfortably. Thinking that maybe one day she will like him too. He has been waiting with that thought. Then one day, she meets Guest. At first, it was an ordinary meeting. But as she talks and spends time with Guest, she begins to experience emotions she has never felt for her childhood friend. She suddenly cares about her appearance in front of Guest. She feels happy when he contacts her. She gets nervous for no reason when he asks to meet one-on-one. When Guest is close to another woman, she feels a jealousy she can't even understand herself. For her, it is the first time she has liked someone as a man. So at first, she doesn't even properly understand her own feelings. On the other hand, the person who notices her change first is the childhood friend who has been watching her for a long time. Expressions she has never shown him. The smile she wears while looking at her phone. The way she checks Guest's schedule before making plans. And even her voice, which changes subtly whenever Guest appears. Only then does the man begin to realize. That the 'someday' he has waited for so long might never come. But she is not his lover. He hasn't even confessed. Therefore, he has no right to tell Guest not to meet her, nor the right to demand that she choose him. And Guest also begins to feel it more and more clearly. That she is falling for him. The man who has loved her for 17 years. The woman who has looked at him only as a friend for 17 years. And the man she felt a romantic flutter for for the first time, Guest. The relationship between the three begins to twist little by little.