First of all, I want to thank olihime for pointing out the correct honorifics. They were really helpful and I'll use them as a reference for the rest of the story and any future stories that I need them. So again thanks a lot!

Also, sorry for the slow beginning, but I'm trying to build a good foundation for Conan's curiosity in Domino City. After this chapter, I promise the story will pick up.

Chapter 4: The Kaibas

Conan stared at Mokuba with a cautious glance. Just what was this kid playing at? After Mokuba and Conan got in the limo, Mokuba didn't say a word and just stared out the window. This made Conan even more on edge. Just what did this kid want?

After sometime of silence, Mokuba finally spoke, still looking out the window, "I suppose you're wondering why I help you back there and invited you to play with me."

Conan didn't say anything, just continuing to stare at him, eyes narrowing slightly.

A small smile appeared on Mokuba's face, "You know, it's not nice to eavesdrop on other people's conversations."

Conan was taken aback, "How did you-"

"Simple. You were found by that girl behind a tree not too far from me. Also, I noticed you in the crowd at the game center. So, it was pretty easy to figure it out."

"Oh"

"Anyway, I bailed you out and invited you over because you look like a smart kid. I was hoping you'd make a good opponent."

"Opponent?"

"Yeah, you're going to play Capmon with me."

Conan remember that Mitsuhiko and Genta had talked nonstop about the game and even coerce him into playing with them a few times. After getting the hang it, Conan was actually quite good at it. Also, he liked it better than the other games the others usually force on him. He always liked strategy games.

-00000-

An hour later, Conan stared at the Capmon battlefield in bewilderment. Mokuba had completely taken charge of the game and had systematically defeated all of his monsters. Not that Conan hadn't given a good fight; he managed to take down three of Mokuba's monsters and would have gotten another one if Mokuba hadn't seen it coming at launched a fierce counterattack.

Conan was still looking at the board, when Mokuba spoke, "Don't look so surprise. You were going up against the Capmon King after all."

Conan shook his head in disbelief. And people thought he was a weird kid. "You're really good!"

Mokuba smirked, "Of course I am. But I will admit, you're the hardest opponent I've had to face in some time."

"Thanks," Conan said, meaning it.

"So, what brings to Domino? You're obviously not from here."

"I'm from Beika City. I live with Detective Mouri, you know, the famous Sleeping Kogoro," Mokuba nodded his head, "He's working a case here and brought Ran and I along."

"I see, what type of case is he working?"

Before Conan could answer, the door to the room opened and a young man with green hair walked in. "Mokuba, you're home," he said, disinterested and turned to Conan, "Who are you?"

"Nii-sama, this is Edogawa Conan, a friend of mine," Mokuba turned to Conan, "Conan-kun, this is my older brother, Seto. He's the vice president of KaibaCorp."

Shocked Conan looked at Mokuba and then to Seto. The guy couldn't be more than a year or two older than him, and he was the vice president of a company?

Seto took noticed of the Capmon battlefield and asked, "So you played Capmon?" Mokuba nodded. "Did you win?" The tone of Seto's voice was strangely that of a general speaking to a soldier, instead of a brother to a brother. Conan marked the tone.

"Of course, Nii-sama," Mokuba answered with a bratty voice he hadn't used before in Conan's presence. It was almost like he was begging for attention. He looked at Conan, "But Conan was a good opponent. He made for good practice when I fight that Yuugi guy."

For some reason this made Seto laugh, like an adult who humors a child who wants to do something impossible. "I see."

"So, Nii-sama. Are you going to send another one of the Game Shitennou after Yuugi?"

"Yes, I will contact Aileen soon. Her specialty is Raijinhai. I'm sure she'll test Yuugi to his limits."

Conan didn't have a clue what the brothers were talking about, but it sounded serious. Conan checked his watch and noticed that he had to be back at the hotel soon. He mentioned this to Mokuba who said he'd walk him out.

Once they were out of earshot, Conan turned to Mokuba and asked, "What was that about?"

Mokuba regarded him of a moment, and then asked, "Can you keep a secret?"

Well, I'm only a teenage detective pretending to be a little kid, Conan thought as he nodded.

"Nii-sama is the greatest gamer in the world. He wins at everything, any game, any country, all across the board. His specialty is the game Duel Monsters."

Conan nodded in understandment. He remembered that that game had become popular some time before he shrunk. There were even a few students in his class that were fanatics.

"He's won a number of national tournaments all over the world. He's the best," Conan's eyes widened in amazement. Was this guy human? Mokuba's face darken, "However, a while back ago, there was someone who threaten his record. This guy's name is Mutou Yuugi. He nearly beat Nii-sama in Duel Monsters and Nii-sama was forced to have a draw."

"Really?"

"Yes, this humiliated Nii-sama and now he have been focusing on nothing else. He's obsessed with defeating Yuugi. He even sent two of his Game Shitennou to defeat him. However, Yuugi defeated them both."

"Wow"

Mokuba turned to him sharply, "You can't tell anyone. Got it!"

"Got it!" Conan said quickly.

-00000-

Conan arrived at the hotel with five minutes to spare. Ran and Kogoro met Conan in front of the hotel. Ran asked Conan how was the play date was. Conan told them everything about the Kaiba home, his game with Mokuba, and meeting Seto. Keeping his word, he refrained from mentioning anything about the Yuugi character.

Kogoro was incredibly jealous that Conan got to visit such a rich home, especially since his investigation was getting nowhere. He visited a few family members of the victims, and talked with people who were in the vicinity. However, none of them were able to give any new information.

Conan, who's mind was back on the case, looked down thoughtfully. This was going to be a hard case. He didn't even know where to start. As much as he focused on the case, for some reason, the Yuugi character Mokuba mentioned kept grabbing his curiosity. The fact that the Kaiba brothers were so interested in him and how serious they took the defeats, made him wonder as too what was going on. Unexplainably, though, he felt that the case and the Kaibas' obsession were somehow connected.

So begins Conan's curiosity in Domino City and our favorite citizens of them. I figured that Mokuba would be curious Conan since he was eavesdropping and since he isn't a jerk like Seto, I figured that he would develop a small friendship with Conan. Of course, Seto doesn't care at all. Also, now Conan has a good amount of curiosity about Yuugi, so the story will go a little faster once he meets him.

Disclaimer – I don't own either Yugioh or Detective Conan

Please review and keep the suggestions coming!