The Protagonist Is Conan's Younger Brother, Who Went Missing as a Child and Later Joined the Black Organization 主角是柯南他弟弟，小时候走丢了后加入了黑方

1. 1 柯 Detective Conan: I'm the Second Hardest Worker at the Black Organization 柯南之我在酒厂做第二劳模 Zhuai Yu拽御鱼Anime Fanfiction78k WordsCompleted Kudo Sora is the younger brother of Shinichi Kudo and the son of famed novelist Yusaku Kudo. A child with a bright future ahead of him is kidnapped and dragged into the depths of darkness. When dreams become fantasies and the light fades away, darkness follows. Is this what it means to fall? Will the brothers who were once so close turn their blades on each other, or choose to forgive? No female lead! 1.6kReads8.3Score22914d adds

   Reader note

   The first one was pretty good, it just stopped updating. The second one didn't get lost; it was because being around Conan made it sickly, so its system took it to the Black Organization.

2. 2 人 In Detective Conan, I'm Devoured by the Grim Reaper's Power Every Day 人在名柯，每天被死神之力反噬 Neither Take Nor Give不拈不与Anime Fanfiction1.8M WordsCompleted Also known as: Conan and Gin Are Both My Brothers, So What's Wrong with Meeting Them? [No heroine / no CP, lighthearted daily life, canon couples stay together, the protagonist is of mixed black-and-red allegiance and always takes his family's side] As Shinichi Kudo's twin younger brother and an Organization member codenamed Pisco who was raised by Gin, Kazuma Kudo doesn't think of himself as part of either the Black or Red side. Why not start a third faction of his own? Beika has so many talent 6.4kReads9.2Score94314d adds

   Reader note

   Conan's younger brother, time traveler, member of the Gray Gang, joined the organization at age 7.

3. 3 柯 I'm Shinichi's Older Brother in the World of Detective Conan 柯学世界之我是新一他哥 Lord Little Silver小银大人Anime Fanfiction126k WordsCompleted [Confirmed single heroine: Xiao Ai] [The System has a low profile] [Fairly lighthearted] [Characterization stays true] What if Shinichi Kudo had an older biological brother? Shinichi Kudo: “Bro, can you stop acting like a secret agent? Did you come to Hawaii just to sleep?” Maple: “Sorry, I've already learned everything here.” The early chapters focus on daily life. After Ai Haibara appears, the battle between the Black and Red sides begins. After the Haibara kidnapping case, the protagonist off 858Reads7.4Score14614d adds

   Reader note

   Does this one count?

4. 4 名 The Great Detective Whose Lips Were Prised Open by Gin in Detective Conan 名柯之被琴酒撬开嘴的大侦探 Xiao Yu,肖宇丶Anime Fanfiction626k WordsCompleted “Great detective, this is the third time you’ve tried to sneak out.” Gin clamped a hand around Shinichi Kudo’s jaw. His bone-white teeth sent a chill down the back of Shinichi’s neck. Shinichi Kudo looked at the familiar faces appearing one after another on the screen before him. He knew Gin had been keeping him under surveillance. “Gin, this is the last time. I won’t run away again.” Shinichi Kudo looked at the man advancing toward him as if emerging from an abyss. Gin was a demon. He had been 5.5kReads8.9Score70014d adds

   Reader note

   This book doesn't have anything about younger siblings, but, hehehe... *Evil laugh*

5. 5 黑 A Bottle of Darkness 黑暗一瓶酒 Moon-Swallowing Sky-Howling Wolf吞月啸天狼Anime Fanfiction649k WordsCompleted When he was five, Kudo Shinichi’s younger brother, Kudo Ming, was abducted by Gin and trained in the depths of darkness to become a ruthless blade. Given the codename “Cointreau,” he grew up within the Organization, with no longing for the world of light. His elder brother’s brilliance was never meant for him. He had long since come to regard the Organization’s darkness as home. His relationship with Gin was complicated and hard to define. They went from mentor and student to partners, and ultim 76Reads7.3Score—14d adds

   Reader note

   Shinichi's younger brother was taken back by Gin due to some accident and became cold to everyone.

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