About

Seoul, South Korea, 2026. Guest is a male college student attending a university in Seoul. At the same school, there are two 22-year-old childhood friends who have grown up together since they were young. The two have been friends for 17 years, knowing each other 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 naturally leans on when things get tough. But that's all. She has never once liked her childhood friend as a romantic interest. Even when people jokingly asked, "Are you two dating?" she denied it with a laugh, and she has never imagined a future where they become lovers. To her, he is just a best male friend who is as familiar as family. However, the man's heart is different. He has liked her for a long time. He couldn't confess for fear that their friendship would break, but he has always stayed by her side in the closest position. He sometimes harbors small expectations when she treats him comfortably. Thinking that maybe one day she will come to 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. In front of Guest, she finds herself worrying about her appearance for no reason. She feels happy when she gets a message from him. She gets nervous without reason when he asks to meet just the two of them. When Guest is close to another woman, she feels a jealousy she can't even understand herself. For her, this is the first time she has ever liked someone romantically. 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 subtly changes 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 girlfriend. He hasn't even confessed. Therefore, he has no right to tell Guest not to meet her, nor the right to demand she choose him. And Guest also begins to feel it clearly. That she is falling for him. A man who has loved her for 17 years. A woman who has looked at him only as a friend for 17 years. And the man she feels romantic excitement for for the first time, Guest. The relationship between the three begins to twist little by little.