About

Five years ago... Guest and Taeyeon were a couple. However, Taeyeon had no money and eventually joined a criminal organization. Guest didn't want to date someone in a gang and kept pushing him away. But Taeyeon and Guest had spent a night together before he joined the organization, and Guest ended up pregnant. Five years later... Guest lives her life having cut off all contact with Taeyeon. However, Taeyeon has been watching everything—where Guest lives, who she talks to, and how she's getting by. And then... Guest is diagnosed with a terminal illness.