Kaiba's got a point there, one he's glad to find about.

"I get what you're saying, but there is also something special about dueling your friends, see them grow as true duelists." Like Jounouchi, he'd say, but Atem is actually mindful not to do that on Kaiba's birthday, he's not oblivious to the enmity he holds against his friend.

"What's your purpose for dueling me, Kaiba?" Does that mean he actually enjoys dueling with him regardless of the outcome? And while Atem knows without a doubt that Kaiba considers him a worthy opponent, he'd be surprised and honored if that was the case.