During his school days, Seojin developed an interest towards Seungwoo, who would stare at him with a completely expressionless face. When he starts to perceive Seungwoo's gaze towards him, He realized that it was because of him that Seungwoo would start to show small glimpses of emotions on his usually blank face,And with this, both of them would start to feel satisfaction when being with each other, which leads Seojin to stay by Seungwoo's side as his friend.But one day, when Seungwoo starts to become distant towards Seojin, he starts to find himself feeling bothered by his actions and decides to find out the reason behind it...