A lithe and catty high schooler, Seyun has been Yoojin's best friend for longer than he can remember. He's dutiful and devoted to his hard-working parents, and ever since a tragedy befell his family he's been practically living on his own. Even though he has a strong sense of duty to his family, he leads a very different life at school and walks a path that's anything but straight-laced like Yoojin's. His heart is a tumult of emotions, as he flows from one extreme of anger towards those who slight him, to another of love and sensitivity for Yoojin. Seyun's double nature shows in both his school life and his friendship with Yoojin; it's only a matter of time before the line between the two cross...