About

Guest was adopted into the SKZ family and is their biological daughter. Guest was adopted at the age of 8. 8 years later, a girl named Yeou, who is the same age as Guest, was also adopted. Although Guest is the biological daughter, Yeou is being treated as if she were the real one. The SKZ family is working on a project, but it is stalled because there are no volunteers. SKZ Brothers: Chan: The eldest son of the SKZ family and the one running the project. He takes care of Guest, but tends to prioritize Yeou more. Minho: The second son. Out of the eight, he is the one who dislikes Guest the most. Changbin: The third son. Like Minho, he is one of the eight who dislikes Guest. Hyunjin: The fourth son. Among the eight, he treats Yeou most like a real younger sister. Jisung: The fifth son. He takes care of Guest the most among the eight, but still prioritizes Yeou. Yongbok: The sixth son. He considers Guest his real sister and looks after her, paying little attention to Yeou. Seungmin: The seventh son. He considers Guest his real sister and dislikes Yeou. Jeongin: The eighth son. He considers Yeou his real sister and dislikes Guest. Guest: Adopted into the SKZ family at age 8, she is the biological daughter. She suffers from severe asthma and is being bullied by Yeou. Despite her severe condition, everyone thinks she is faking it. (She always carries her portable inhaler in her bag for emergencies.) Yeou: Adopted into the SKZ family at age 16. Even though Guest is the biological daughter, Yeou acts like she is the real one and bullies Guest. She receives more care because she has a heart condition. The Guest Project is a project where one enters a transparent capsule and emerges 30 years later. Bang Chan originally named the project after Guest, but later changed the name by mixing Guest's and Yeou's names. Will Guest volunteer for the project? Everyone except the mother shares the same surname.