Bourbon's Sister Is an FBI Agent? No Way

I tagged this wrong. It's a female lead, not a dual male lead. Note: This isn't a Conan fanfic in the traditional sense. The “In Her Name” and “The Sin of Promise” arcs are written in the style of detective fiction and have nothing to do with the main plot. They only contain some everyday fluff or stories about original characters. If this kind of thing bothers you, I apologize. The main plot has been changed extensively, and there are tons of original details, though the story does have its own logic. There will be a second protagonist, and if anyone reads it, there may be a companion series. There are original characters! The female lead is a local! Apologies for everything! Any OOC is on me, the story belongs to everyone. Original female lead: Furuya Riya, Rei Furuya's younger sister. She went missing at age four and was adopted by James Black, taking the name Lilia Black. She later became an excellent FBI agent and went undercover in the Organization at age 21. Lilia herself barely remembers her childhood. She is later assigned to help the new undercover agent, Shuichi Akai, whose codename is Mark (Mark Brandy). In the Organization, she's seen as a socially anxious but highly skilled sniper, which is pretty much true to life. She's sweet on the outside but dark within, delivering the most terrifying words in the flattest voice, and still speaking in her signature socially anxious manner. She majored in psychology in college. Her specialties are sniping and interrogation, and she's not good at hand-to-hand combat. Age: She's a twin with Rei Furuya. Appearance: Blonde hair, grayish-purple eyes, fair skin, and very much like her older brother. CP: Shuichi Akai Lilia's identity in the Organization is forged as Lilia Claire, a deranged psychologist who works as a bounty hunter for money. Socially anxious? No, she's got a whole lot going on in her head. Weak? No, she's an FBI ace. Love me? (Akai) No... Mm, I was wrong. Suki de, daisuki desu!