My first (posted) HikaGo fic. This is, obviously, a Yu-Gi-Oh! Crossover. It's a one shot, as well, just a little idea I had after recalling Seto's white trench coat.
Seto looked at Mokuba. "You really want this for a birthday present?"
"Please, Seto? We don't have to do anything. I just…aren't you ever curious?"
The CEO shook his head. "You're the only family I ever needed. Besides, if we had relatives, why didn't they adopt us in the first place?"
Mokuba shrugged. "Maybe they didn't know about us. It's not that I want to live with them, I just want to know if they exist or not. Please, please, please can we?"
"Alright. I'll have a friend of mine at the government check our blood against the records. If anyone's ever set up an 'in case of kidnapping' file, or if they've ever been convicted of a crime, then we'll know. I'm not sure if we want to know relatives who have been convicted of crimes, but that's not exactly the point."
"Thank you, oniisan!" Mokuba beamed.
The results came back three weeks later, and they were…odd. Seto called his government contact immediately. "Convicted of assault as a twelve year old?" he demanded.
"There were extenuating circumstances," the man explained, "but the judge wanted to make an example. He's grown up very nicely. A lot like you, actually, except he's obsessed with Go instead of card games and business."
"Just try, Kaiba-san. He's a little stiff, but you might like him."
Mokuba decided he wanted to meet the Go player cousin of theirs himself. He dragged his big brother along, and they took a limo to Tokyo. A boy with green hair – green – pointed out the one they were looking for.
"Ogata Seiji-san?" Seto asked, surprised by how nervous he felt.
"My name is Kaiba Seto, this is my brother, Kaiba Mokuba. We were adopted about ten years ago and recently decided to try to find our relatives."
Ogata held up his hands. "Whoa, I might be old enough to be the kid's dad, but you look like you're twenty already."
"I never said you were our father. Our parents died in an accident, I remember that much. You're about a cousin's worth of genetic material," Seto shrugged.
Ogata scratched his head. "Oh, yeah, my aunt died in a crash a few years ago. Mom heard about it, but they had drifted apart over the years…plus – " Ogata stopped suddenly. "Dad didn't want anymore kids running around," he amended.
Seto nodded once, not entirely convinced.
"It was their biggest fight," Ogata said seriously. "I seriously thought Mom would divorce him if he didn't let her adopt you." He shook his head. "Then she got…sick. And I never heard anything about cousins again, orphans or not. Even when she got better, she didn't mention you."
Mokuba looked at his hands.
"So…either of you play any Go at all?" Ogata asked, changing the subject awkwardly.
The brothers looked at each other.
"The only board game I play is Shogi," Seto said finally.
"Whaaaa?! Shogi?!" Ogata exclaimed in horror. "Noooooo!"