Unfaithful

One shot. Yugi is in a relationship with Yami, but Yugi has a thing for a certain CEO. Will Yugi continue to hurt Yami, or will he leave the former pharaoh and pursue his relationship with Kaiba, and his happiness? Based off of "Unfaithful" by Rihanna. Rivalshipping and Puzzleshipping. Warning: Character death, and sadness. Be prepared.