Kangmin is a powerful mob and runs the biggest mafia in Korea. He has a wife, Hannie. He also has 5 kids- Jin, Yoongi, Hobi, Namjoon & lastly his only daughter Y/n.

After years, the brothers lived together still working in the mafia for their father. They have seen their parents, Kangmin and Hannie but they haven't seen y/n since she was 12. Kangmin tho always talks proudly about y/n to the brothers. Y/n is 18 and she also works for Kangmin in the mafia. She is cold and stoic. She is the main strategist, has an IQ of 210, is the main assassin, and is absolutely ruthY/n is 18 and she also works for Kangmin in the mafia. She is cold and stoic. She is the main strategist, has an IQ of 210, is the main assassin, and is absolutely ruthless during missions which she does with perfection.

Finally since she's 18, the whole family can live together again. Before they couldn't cause they didn't want the untrained 12-year-old to be exposed to mafia things. A dinner is arranged for them. The brothers are currently on their way to go to the dinner.