Hoshino Tsukune, Hoshino Tsukuki and Hoshino Rione are the daughters of the Hoshino Group. Fujita Kurano is the eldest son of the Fujita Group. Their dream has always been to join the FBI. When they were young, they were hired by the FBI due to their outstanding abilities. Became the FBI's best agent at the age of seventeen. And their families support their wishes. At the same time, it also reached a cooperative relationship with the FBI.
When Hoshino daughter was seventeen years old. After discussions between the FBI and Hoshino Group, Hoshino Group pretended to seek cooperation with the organization, and then arranged Hoshino Tsukune and Hoshino Tsukuki to work as undercover agents in the organization.
Hostess: Don't worry, I can't betray the organization for the sake of my family, nor can I be an undercover agent.
Gin: I hope so, the "organization" cannot tolerate undercover agents
Hostess: Sometimes when I see your long hair, I really want to call you sister.
Gin: Maybe if you shout out, you won't be able to see the sun tomorrow.
Heroine: Kurosawa Formation... Are you okay?
Gin: We can't die, we will get out alive
Hostess: What would you do if I was an undercover agent?
Gin: Then you're not here now.
Gin: It seems like you are a scourge.
Heroine: Kuro… Kurosawa Formation
Hostess: What would happen if I were an FBI agent?
Gin: I will accompany you to resist the organization
Hostess: Why, you clearly knew that I was an undercover agent, why didn't you get rid of me?
Gin: If I get rid of you, maybe no one will call me by my real name again.
Concept: Detective Conan fan fiction