The Third Brother
Try picturing this:
What if your parents died and left you and your little sibling to go to an orohanage? The two sons, Seto and Mokuba, come to an orphanage. There, they spend quite a few of their days, wondering if they will be adopted someday. Being adopted by a crazy rich father is hard, but finding out his secret room and his son knowing will be even harder later in life. But who is this son? Do you remember him?
"What happened to ya, Kaiba?"
I don't own 'Yu-Gi-Oh!'. I only own certain chapters of this book, and I own Brandon and the Mikono's. 'Yu-Gi-Oh!' belongs to its original creator, Kazuki Takahasi.