Soldier's recommendation book, the title of the book has the word " confused ", and it tells the story of the male protagonist. Have you read it?

The female lead was very confused. She was a special forces soldier and also a hacker, White Fox. What was the name of this novel? Anyway, the title of the novel had the word 'muddle'... The male lead is also a soldier. It seems, I mean, it seems to be a gangster. The male lead is good friends with the female lead's 2nd senior brother. The female lead's eldest senior brother is a bad person... Seeking the name of the novel...