Author's Note: I'm redoing parts of this story, also Yu-gi-oh is not mine, or Tristan and Pegasus would have more merchandising.
Kaiba/Pegasus obviously, with rare hints of Honda/Jounouchi/Otogi
NC-17
Monday – Prologue - The Night Before
Rain poured into the streets of the city at midnight. Seto Kaiba sat down at his computer station and began quickly clicking through each screen to make sure everything was being done the way he expected it to. Everything had finally calmed down and the city was once again peaceful and dull. There were no duels to be had, no monsters to destroy, no people trying futilely to take over the company. Finally, Kaiba had time to take care of his company without having to worry about interruptions of any sort. But other than that, there was nothing else to do in Domino City. There had been no news of Yuugi, not that he really cared. There had been no news of Jounouchi either, which didn't surprise him in the least. Kaiba's eye twitched slightly as he heard the door being opened. Whoever it was opening the door was trying to be extremely quiet. Mokuba.
"Seto, it's time to go to sleep. You can do your work in the morning." Mokuba rubbed his eyes and waited for his big brother to leave the computer. Kaiba sighed, knowing that Mokuba would stay right there until he fell asleep himself.
"Alright, fine. You go back to your bed and I'll go to sleep after I shut everything down." Kaiba made a move to start saving his documents and closing them out. Mokuba seemed satisfied with that, but pressed a timer on his watch as he stepped back out the door. Once Kaiba had closed all the screens, a familiar rabbit appeared on the screen and announced that Kaiba had mail. Kaiba's teeth clenched at the sight of the rabbit.
"Great, just what I don't need right now." He contemplated deleting the mail without reading it, but this was the man who created Duel Monsters. If Pegasus ever decided to charge Kaiba for his massive use of the game in his own products or sue him for using the Blue Eyes White Dragon in all his constructions, things wouldn't be pretty. Grudgingly, he opened the email to see what Pegasus had to say.
"Kaiba-boy. I have a business proposition for you… Meet me in Duelist Kingdom in the morning. I promise I'll make it worth your while."
For a while, Kaiba just sat staring at the screen, and then continued to shut the computer down into complete blackness. He turned in his chair and stood up to head for his room.
"Heh…should I go?" He never saw the concerned look on Mokuba's face as the younger brother disappeared into his own quarters. Kaiba undressed and climbed into bed, only to stare at the ceiling for hours before he submitted to the darkness behind his eyes and fell into a dreamless sleep.