"I never considered... adopting a second kid. I didn't even formally adopt Kouryuu."

On a world where love is death, it may have just sped the tragedy up if he had. But he still can't help but find it another fault in his parenting, that that step hadn't even entered his mind.

"Buttercup's always reminded me of Kouryuu. But it's not fair that she got linked to me like that. What if she hates me, now? I can't... blame her if she does."

Because, you know, he's a failure.