[ Seto's response is a content smile. Honestly, this is all he wants. He doesn't need to drag this out, they know they love each other, everyone else knows it too.

But he does need to respond, so: ]

I wouldn't have blamed you if you never forgave me. I resisted for so long. I used to be afraid of the changes I was undergoing. But after everything, I'm absolutely certain that I'm who I want to be, and that you're who I want to stand by. You challenged me to become a better man...and I can never resist a challenge from you.

[ He closed his eyes, took in a deep breath...and opened them once more, gaze soft. ]

Yugi Mutou, I love you. I will always stand beside you...and no matter what happens, I'll find my way back to you.

[ He very subtly cocks his head at the two critters at the end of the aisle. That's your cue to bring the rings! ]