First, he heard the voice: "Kaiba Setooo," calling him in the night. And then, when he turned over to go back to sleep, "Kaiba Setooo."
A few weeks of this, and he started seeing him: A pink-suited wraith, floating too close to him at night. "It's your fault," in a trailing voice, "You know it is, Kaiba Setooo."
"Go away." He swatted, but of course you can't swat a ghost. "You're not real," trying to drown out his mocking laughter, "You're dead. One of Yuugi's friends killed you."
"Yes." The hair floating around ghost-Pegasus' head gave him a ghastly look. "And it's all your fault." He hovered beside Seto, all the way upstairs. "If you'd just sooold me what I wanted."
"Shut up!" Seto couldn't help swatting again. "You talk even more than you did when you were alive." Holding the door handle, "I'm going to bed." He slammed the door behind him, and locked it, which didn't make sense, because if there were such things as ghosts, which there weren't, then they could get through locked doors, couldn't they?
All that week, and half the next, Pegasus respected the door. After that, he came in. "Do you mind," Seto demanded, as he pulled back the covers, "I'm trying to sleep here."
"This is all your fault, remember?" His ghostly toes were cold as he got in. "Oh, you sleep naked."
Seto pulled away from his ectoplasmic bedmate. "What if I'd had someone here with me?"
"I checked first." Pegasus put misty arms around him. "If you'd sold me the console, I wouldn't be dead, you know." Resting a transparent head on Seto's shoulder, "Or if you'd let my hit men kill you, you'd be dead too, and we could get married.." He cuddled close.
Seto shivered. "You're freezing cold." He tried to get loose. "Why are you bugging me?"
"I'm your friendly ghost." Seto felt an immaterial nose nuzzle his throat. "I'm going to be with you forever and ever," nibbling with ice-cold teeth, "or until you forgive Yuugi for beating you." He chuckled, "which is the same thing."