Disclaimer: I do not own the story or characters of Yu-Gi-Oh!
Katsuya was absentmindedly tracing nonsensical patterns over Seto's bare chest as they rested quietly in their bedroom. Being careful to not wake Seto up, he held the card locket Seto always wore around his neck and gently opened the clasp.
He let out a silent chuckle at Mokuba's picture. He looked absolutely adorable, with his big eyes and big grin. One of the things Katsuya had always loved about Seto was how much he cared for his little brother. Seto had told him stories of their life at the orphanage, and Katsuya had only fallen more in love with him after learning about how strong he was, and how he did everything to make sure they would stay together.
It caused Katsuya to reflect on his own relationship with his sister. He loved his little sister, but after seeing Seto's relationship with Mokuba he wondered if there was more he could have done to keep Serenity and him together. He could still remember running after his mother and Serenity, as they drove off away from him. He remembered the tears running down his cheeks as he screamed for his little sister, while his little sister was crying out for her older brother as well.
Katsuya sighed. Was he not as good of an older brother as he thought he was? He always thought that he had tried his best to be a proper older brother to his dear Serenity, but looking at how Seto had fought to keep his own brother with him, Katsuya felt like he didn't try hard enough. The thought alone was enough to cause a painful feeling to rise up in his chest.
If he weren't useless, if he was a better son…maybe his mom wouldn't even have left him behind in the first place.
"Puppy?"
Seto's quiet voice shook him out of his thoughts. Looking up, Katsuya could see the concern in his favorite blue eyes. Smiling and closing the card locket, Katsuya kissed Seto's lips gently.
"Yeah?"
"Are you alright? You're crying."
Reaching up, he was slightly surprised to feel the wetness on his cheeks. He didn't notice that he had started crying. Katsuya sighed.
"Yeah, I was just thinking about stuff."
Seto shifted, pulling him into his arms. "About what? You can talk to me."
Taking a moment to collect his thoughts, Katsuya fidgeted slightly.
"I was thinking about my little sister. Mainly about how we were separated. And, it got me thinking about you and Mokuba…it made me wonder if there was more I could have done to keep Serenity and me together, you know? You were able to keep you and Mokuba together, and I just feel like maybe I'm not such a good brother after all."
Seto remained quiet for a moment while Katsuya became more nervous. Were his fears right?
"Puppy, I think you're a great older brother. It's obvious how much you love your sister, and Mokuba too."
"I do love them. There isn't anything I wouldn't do for them. I just wish me and Serenity would have been together like you two were, like you were able to do for Mokuba."
"Our situations were different though, puppy. Mokuba and I only had each other. You had your father and your mother to worry about, and I'm sure that you felt like you couldn't leave your father either, right?"
Katsuya nodded. "Even though he turned out to be a bad father, he was still my dad…and I couldn't abandon him."
"You've done a lot for your sister, Katsuya. You raised the money to save her eyesight, you protected her when your mom threw her out because she wanted to stay with you. You took custody of her and you've always tried to make her happy. Really, there isn't much more she could have asked for from an older brother."
Feeling Seto's lips brush over his forehead, Katsuya smiled. "Thanks, I feel a little better now."
There was some moving around as Seto reached into their nightstand drawer, pulling out a flat, square box. "Here."
With a questioning look, Katsuya pulled off the lid and gasped. Inside was a card locket, the same ones that Mokuba and Seto always wore around their necks. "Is this what I think it is?"
Seto smiled. "Yes, I had one made for you recently. Your sister will be getting one soon as well, from Mokuba. I was planning to give you this at a later time, but now's a good of a time as any."
Taking the locket out of the box, Seto beckoned for Katsuya to tilt his head forward so he could clasp the locket into place on his neck. Katsuya held the lock and gently opened the clasp, laughing as he saw a smiling picture of Seto staring up at him.
"I've also made some adjustments to yours, and I'll be making similar changes to everyone's locket too." With a single finger, Seto lifted the picture, and Katsuya saw a picture of Mokuba behind Seto's picture. There was also a picture of Serenity.
"I love it! Thank you, Seto. I really feel part of your family now." Tackling Seto onto his back, he covered his face in kisses and felt his worries from earlier wash away.
"You and Serenity make our family complete." Capturing his lips in a passionate kiss, Seto smirked. "A perfect fit."