Seto Kaiba bio.

That faithful day at the orphanage, instead of being adopted by Gozaburo Kaiba, Seto Kaiba and Mokuba Kaiba are adopted by Maruo Nakano and are now the adopted brother of Ichika, Nino, Miku, Yotsuba, and Itsuki. However, after a duel against Yugi Moto, Seto has made it his life's goal to find a way to defeat his rival. (note: Seto will still be the president and CEO of KaibaCorp but he will have three decks: Blue-Eyes, A-to-Z, and Thunder Dragon)