The story is fictional and the time is made up. There won't be too much abuse in the full text, so feel free to eat it.
Luo and his brother accompanied his sister to a grand party. Luo and his brother met the most important person in their lives there, and their sister also met the most important person in her life. After the grand event, a few days later, Luo and his younger brother went to participate in the World War, but were interrupted by a mysterious person midway...