"I . . . Sets I . . ." He closed his eyes, fighting tears, "I abused you. I've been abusing you this whole time. I didn't mean to, I swear! I never put it together! I swear to god I never meant to hurt you! I never meant to do what all the other people in your life have! But I did. I did Setsuna. I've hurt you, over and over again, and I have no way to ever apologize to you . . ."

It felt like he was tearing his heart out. Everything he'd ever tried to build with Setsuna was gone in a few words, but he'd had to say them. He couldn't just walk away and leave his baby brother so confused and hurt. He couldn't be that much of a monster after everything else he'd done.