Note: This is just another cliché story about Yami losing Yugi to the Seal of Orichalcos and then learning to forgive himself again, blah blah. After reading so many of these, I had to write one eventually. The first chapter is just Yami's thoughts about betraying Yugi, and the second is the story of how Yugi convinced him to forgive himself.
Normally I never use the titles aibou and mou hitori no boku because I go by the English anime, but they fit in with the story, so I included them this once. Sorry for any inconsistency.
{Yami}
Aibou, aibou, what have I done? How can you be gone? How could I have done this to you? How could I have betrayed you? It is all my fault, all my fault. I feel so empty without you, one half of a soul trying to fill an entire body. Your body. How can I stay here in your skin when you are not here? I feel alone, so alone. Our friends stand by me, though I think they should condemn me. They are still here, but it is not the same. Is not the same without you.
Yugi, what have I done? You warned me not to play that card, and I knew better myself. I knew the Seal was evil, yet I played it anyway. The anger and hatred in my heart got the best of me, controlled me. But the real reason I played it was because of how much I hate feeling powerless. When I am powerless, I cannot protect you. I just wanted to protect you. And instead I hurt you, sent you away. Let them all think that the only reason I did this was because my dark side took control. It is what they should think. Leave love and protection out of it, because nothing can excuse what I did. The road to Hell is paved with good intentions. I would rather they think that I am hate-filled and evil, because that is what I deserve. They should hate me, aibou, and so should you.
Other Me, what have I done? Without you I feel as if all the darkness inside me is clawing its way out. Without you I feel as if I am becoming evil. So perhaps Rafael was right. Perhaps I really was an evil king. How would I know? I cannot remember. Meryet assures me it is not so, but not even she could see into my heart. And though I feel guilty for doubting her, I wonder if she would claim I was a good king regardless of the facts in order to try to purify my heart now while I cannot remember the past. Is this what I have come to? I am thinking in circles, round and round, always coming back to one thought: What have I done?
Other half, what have I done? My heart is shattered, my soul is broken. Without you, I am nothing. Nothing. I don't belong here. I am tied only to you. I feel like a thief, sending your soul away and inhabiting the body you left behind. Because it is not mine. Nothing is mine, not anymore. Perhaps I have been too hasty in accepting the things you offer me, because none of it is mine. The things you give me, your body, your friends, your memories, they are not mine. Nothing. I cannot stand to look anyone in the face anymore. I feel like giving up, but I cannot. Not until I rescue you.
Partner, what have I done? I will try to make it right. I will retrieve your soul from the Orichalcos. And then what? I am not sure I can look you in the face again. I fear that you hate me now. But I fear even more that you have forgiven me. I deserve your hatred. I do not deserve your forgiveness, your kindness. Maybe when you return I can lock myself away in the puzzle again. You will not have to share your life with me anymore. You will not have to worry about foes seeking you out as they search for me. You will not have to help me remember my past and fulfill my destiny. You will not have to worry about me. You would be better off without me.
Oh, Yugi, what have I done?