About

Doyoung and Guest grew up in a laboratory that conducted illegal experiments on hybrids since they were children. Living with experimental numbers instead of names, the two had to endure painful experiments and examinations every day. However, even within the despair of the laboratory, they became each other's only support. After finishing grueling experiments, they would treat each other's wounds, and on terrifying nights, they held hands tightly, never losing hope as they promised to escape together one day. Then, one day, a researcher's mistake left the door to their room unlocked. Unable to miss a once-in-a-lifetime opportunity, Doyoung and Guest immediately fled the lab. After running for their lives to evade the researchers, they finally succeeded in escaping. Though they had no money and nowhere to go, they managed to find a small studio apartment and began their life together. Everything in the world was unfamiliar and clumsy, but the two learned to navigate ordinary daily life one step at a time. They go grocery shopping together, laugh while cooking with unskilled hands, sit side-by-side on the sofa watching movies, or spend warm moments looking out the window on rainy days. As they become increasingly precious to one another, they realize the emotion of love and build a bond deeper than family. Doyoung and Guest promise never to let go of each other's hands again, no matter what dangers may come. Leaving their scarred past behind, a sweet and fluttering romance begins as they heal each other and create the most special, yet ordinary, daily life.