Mitsuharu

Title: Mitsuharu
Rating: T
Fandom: Detective Conan
Summary: There were only three kids of the Akai Family, right? There was no way that Masumi had a third older brother. So why the hell were these people calling him Akai Mitsuharu? More importantly, how the hell was he even alive!? [OC Insert as Akai Sibling]
WARNING: This story contains spoilers for Chapter 1037! Read at your own risk!

Mitsuharu sat in his booster seat on the plane. Mary sat to his right and his big brothers sat to his left. Haru was given a drawing pad and some crayons to keep him occupied. "Why?" Shukichi asked Mary, clearly upset. "I have so many friends in England! Why do we have to go to Japan!?"

"Did you already forget what Dad told us in his message, Shukichi?" The eldest child reminded. "From now on, we'll be living in Japan, hiding the fact that we're actually British. Speak the Japanese Mom and Dad taught us,"

"But I didn't even get to say goodbye to my friends properly," Shukichi pouted.

"Kichi-nii," Haru said, not taking his eyes off his drawing pad. "It's either move to Japan or get killed,"

Shukichi stared at his baby brother in horror. "K-Killed?"

"Mitsuharu, who told you that?" Shuichi eyed the toddler suspiciously.

"We gotta move to stay safe," Haru pointed out. "That's the only reason we'd move since you and Kichi-nii are happy here,"

"That's quite a deduction you made, Haru-kun," Mary commented, slightly unnerved by the child's intellect. "Shukichi, Kohji died a mysterious death in the USA and at Haneda's request, your father went to uncover the truth behind the murder. When he realized he'd become entangled in a struggle with a terrifying opponent, he thought it'd be best if we go to Japan to be on the safe side,"

"Dad's probably gonna die or at least go missing," Haru finished his messy doodle of a murder of crows. "The crows gonna get him,"

"Haru, I think you should take a break from all those mystery shows you've been watching," Mary told him. 'He was probably watching some show with crows portraying the villains,' "Dad's strong and he'll catch all of the bad guys and come back to us soon. After all, he has three cute sons waiting for him and he'll want to meet this little one," She put a hand to her abdomen.

"Little one?" Shukichi stared at his mother's stomach.

"Your little sister," Mary smiled.

"Her name's Sera Masumi," Haru did a quick sketch of a seven year old Masumi. "This is gonna be her in seven years,"

Shukichi and Mary brushed it off as childish creativity. "How are you so sure that she won't have light hair and blue eyes instead?"

"Cuz she won't," Haru knew that he probably shouldn't be revealing all of this, but he had nothing better to do. Besides, it's not like they'd actually believe him, right? "She'll look similar to Pierrot-nii," He pointed at Shuichi with one hand while sketching another picture with the other.

"Pierrot?" Shuichi blinked in confusion. "Isn't that a traveling circus clown?"

"You're gonna be Pierrot-nii," Haru grinned.

'First he calls me 'Silver Bullet' and now 'Pierrot',' Shuichi noted. 'I know that Haru's only two years old, but he's rather advanced for his age. He's already making observations and deductions. Is he a child prodigy? It doesn't matter right now. I need to focus on convincing Mom to let me study abroad in the US,'

XXX

They reached their new apartment. It was large with three bedrooms. "We'll have to buy furniture such as beds, a couch, tables, and chairs later," Mary mumbled as she looked around. "Tonight we'll sleep on the futons we brought,"

That night, Haru curled up against Shuichi's chest. Haru kept on insisting on sleep beside his oldest brother instead of his mother. 'He's gonna leave soon. I won't be able to spend time with Shuichi until ten years from now,'

XXX

"Eh!? Shuichi-niisan is gonna move to America!?" Shukichi exclaimed.

"Yeah," Shuichi nodded. "I'm going to study abroad,"

Haru hugged Shuichi's leg. 'I never had siblings in my previous life. I've never been attached to anyone except my parents. I never had friends that I could say were close enough to be siblings. But now, I know what it feels like. Is this what parents also feel when they send their kids off to college? I don't want Shuichi to leave but it's better for him so he can be the FBI Agent he wants to be. Also for the plot,"

"I won't be gone forever," Shuichi told him softly and crouched down to hug him back. "I'll call when I have free time,"

Haru passed a messy crayon drawing of them seven years from now. "Don't forget about us,"

'This looks like us at a beach. But why did Haru draw himself older? He drew that seven year old version of our sister too,' Shuichi neatly folded it up and tucked it into his pocket. "I won't forget about my own family, Haru,"

XXX

A few months after Shuichi's departure, Akai Masumi was born. Taking care of Masumi was a lot more work than when Mitsuharu was a baby. Contrary to Haru, Masumi cried all the time. Haru could barely get any sleep! It was a miracle that Shukichi didn't fall asleep in class either, though he often skipped out on eating lunch to take a nap instead.

About three years later, Mary had the four of them change their surnames to her maiden name, Sera. Masumi, being a little under three years old, didn't question it. Haru didn't care either but he knew why. Shukichi understood when Mary reminded him of their father's message.

Shukichi started high school while Mitsuharu started elementary school. Haru often dozed off or doodled in his notebook rather than pay attention to the lessons. He already knew how to do all of the exercises. The only thing he really had to practice was kanji. He struggled a bit, but with his brother's and mother's help, he got the hang of it. Since he always got the best grades in class, his teachers didn't pester him to focus on the lesson.

Haru was unused to having to look after a younger sibling, but he cared deeply about Masumi. Since they were closest in age, Masumi was closer to Haru than Shukichi. Haru told Masumi stories that he read as a child in his previous life. While Mary and Shukichi taught her Japanese since they lived in Japan, Haru taught her English. Sometimes she mixed up the two languages but she quickly learned which ones were English and which ones were Japanese.

After four years of living in Japan, they were going on a vacation to the beach to reunite with their eldest brother.

Next chapter, Haru is gonna meet Chibi Shinichi and Chibi Ran at the beach.