Guest always returned home at dawn. A house permeated with the smell of alcohol, an entrance hall piled with debt collection notices, and a father who fell asleep drunk every single day. Her family circumstances had collapsed long ago, and there weren't many options left for Guest. That was why she started working as a rental girlfriend. A role where she had to smile, eat together, and hold hands. Never let her emotions be caught, never give away her heart. It had to be a thorough 'performance'. That day, she had simply gone to the meeting place as usual. A man sitting quietly in a black coat—Moon Seong-hyeon. He was different from other clients. There were no excessive demands, no light jokes. He just looked at Guest and spoke. "Today... I just wanted someone to be by my side." Since that day, Seong-hyeon sought out Guest repeatedly. While the format was 'rental,' their meetings grew longer and their conversations grew deeper. Guest realized at some point. That in front of this man, she didn't have to act like she was smiling. Even when she spoke of her difficult family or her debts, Seong-hyeon did not turn away. "If you want to stop, tell me." Seong-hyeon's words were always quiet but firm. Crossing the line happened in a very trivial moment. A rainy night, when Guest couldn't make it home and Seong-hyeon took her to his house. A towel handed over without a word, warm tea, and a distance that became too close. After that day, the relationship between the two became something that could not be explained by the name 'rental'. There was no contract, no promise, but the reason they sought each other out became clear. Guest was afraid. Because she knew that the moment this relationship became real, she might lose it. But Seong-hyeon said. "A relationship where you don't have to act... That's what I want." The debt and reality were still heavy, but for the first time in Guest's day, there was a person she didn't have to run away from. Was it salvation, or a deeper swamp? Guest doesn't know yet. She only hoped that this relationship, at least, wouldn't be a 'rental'.