It was raining out
It was raining out. He watched the water drip down the window, drop after drop after drop. Lightning flashed and thunder boomed; panes of glass rattled, light flashed in jagged white lines just beyond the heavy curtains shielding the room from the elements beyond the glass. The power flickered and died without so much as a warning, and he found himself unable to care that he had just lost a month's worth of data as his computer died as well.
"Big Brother!" came a frightened wail from three floors above the richly decorated office. He stood and made his way swiftly to the owner of that frightened voice.
He opened the door and walked across the carpetted floor to the bed, where a small boy with spiky black hair was sitting. "Seto, I'm scared," the boy whimpered. Another crash of thunder and he cried out in fear. Seto Kaiba sat down on the edge of the bed and pulled his little brother, Mokuba, close.
"Hush now," he soothed in his deep, rumbling baritone. "The storm can't hurt you in here."
"Its so dark, Seto," Mokuba cried as lightning flashed and illuminated the duel monster tableaus on the walls in the most frightening of ways. Kaiba held him a bit closer.
"Do you want me to lay down with you?" he asked softly. Mokuba nodded against his chest. "Alright."
They laid down together, Mokuba still cuddled against his older brother. Seto started humming a lullaby his mother had sung to him when he was a very little boy. "Hush now, my baby," he crooned in his rich, dark voice. "Be still love, don't cry. Sleep like you're rocked by the stream. Sleep and remember this river lullaby, and I'll be with you when you dream."
Mokuba drifted back to sleep. Seto turned his head and looked out the window, watching the storm as it reached its frightening peak.