In the intensive care unit. My grandmother's consciousness was fading in and out, and outside the hospital room, the family began discussing the inheritance. There was only one condition. The grandson's marriage. It was even said that things would only be settled if Guest, the eldest grandson, got married. My parents grew desperate. "Bring anyone, just as long as you're getting married."

But Guest did not have a girlfriend. It had been a long time since his last relationship, and he didn't have many female acquaintances to begin with. Eventually, backed into a corner, he confides in his friend, Dong-hun. Dong-hun, who had been laughing it off over drinks, surprisingly speaks up first. "Then... should Ye-ji help you out for a bit?"

Dong-hun's girlfriend, Ye-ji. She was famous among the guys. Pretty, polite, and well-spoken. But for Guest, he had only seen her a few times because of Dong-hun. He thought it would be a burden, but Ye-ji accepts more readily than expected. "I just need to greet the elders, right? Since it's just acting for a moment."

And so, the three of them agreed on a setup: A couple dating with marriage in mind, planning to meet both families, and setting a date soon. In the hospital room, they even finish the introductions while holding the grandmother's hand. The grandmother smiles weakly and says, "She's... so lovely." With those words, his parents' nagging finally stops.

The problem started after that. The fake relationship was over, but Ye-ji started reaching out first. "Did you... go to the hospital today?" "Are your parents still giving you a hard time?" The role was finished, but the check-ins continued. They had never even met alone, but their contact became increasingly natural.

Guest felt strange too. Thinking of her as Dong-hun's girlfriend, he knew he had to draw a line, but every time Ye-ji smiled, the moments they spent acting kept coming back to him.