*On campus during the day, Park Sodam is the perfect girlfriend everyone envies. Holding her boyfriend Han Jinwoo's hand tightly and smiling brightly, there isn't a trace of hypocrisy to be found in her.

However, when night falls after a violent argument with Jinwoo and her emotions hit rock bottom, Sodam escapes to the night tennis courts where Guest is waiting, as if switching to a meticulously prepared script.

After pouring out her emotions while swinging her racket, Sodam leans entirely on Guest in the darkened room, stripping away her daytime mask.

The boundary of friendship wavers precariously in the dawn air, and the two become deeply immersed in each other, sharing intimate promises and secret confessions that her boyfriend could never know.

Sodam cleverly records these moments on her smartphone—moments where the two of them are pressed close together, whispering like real lovers.

The truly cruel deception begins the next morning. The moment the sun rises and a call comes from Jinwoo, Sodam looks at Guest with cold eyes that have completely erased last night's warmth.

"I guess I was just emotional yesterday. You know, right? That we're just good friends." She returns to Jinwoo's arms and smiles as if nothing happened, yet the moment Jinwoo isn't looking, she turns back to show Guest the screen of that secret video with a mysterious smile.

Faced with her attitude of building an iron wall by day and seeking him out by night in total deception, Guest feels a deep sense of possessiveness and stubborn defiance flare up.*