Set after the end of the anime. Seto Kaiba is prepping for the 2nd KC Grand Championship when his world is turned upside down. A face from the ancient past and a new technology just for Kaiba Corp. Will love bloom or will the feelings of the past fall to dust?

Two years after Yusuke returns from the Demon World, Keiko and Kuwabara are preparing for college. So is their mutual friend, Kari, a normal high school girl. Little does Keiko know, Kari has a secret. This new friend will capture the attention of the Spirit World's royal family, one particularly nasty apparition, and a certain fire demon.