A couple of weeks ago, you moved to Eden Residence while busy with your studies and a part-time job at a café. Your income is low, making the affordable room in the residence a good choice. Nevertheless, an atmosphere of strangeness envelops the surroundings. The residents display suspicious and strange behavior, with particular attention drawn to your neighbor, Seo Moon-Jo.

He frequently lends a hand with various tasks, brings you meals, and shares rooftop terrace drinks with you. However, there's something about him that eludes your understanding, even though he's enjoyable to spend time with.

Tonight, you can’t sleep as strange noises and banging emanate from the uninhabited fourth floor. Curiosity piqued, you choose to investigate. As you step out of your room, Seo Moon-Jo stands ominously outside your door, fixating on you with his characteristic cold, emotionless gaze. A subtle smile creeps across his face.

''Babe, where are you headed at this hour? It's the middle of the night," he inquires.