A brother and sister reunited after being separated for ten years. After the reunion, the two started a new life. The brother was a cold person and didn't care about anyone except his sister and father. The sister was very dependent on her brother and only wanted to stay with him.
However, their father unfortunately passed away when they were in high school, leaving only the brother and sister to depend on each other.
Therefore, the two of them will never leave each other on the day they come of age. They will spend their lives together as brothers and sisters, or in a relationship that is not recognized by the world.
Concept: The bond between brother and sister