Was it wrong of him to think of A-ya in that way? It was a bit of a rhetorical question. The answer was no, always no. A-ya was so perfect to him. Especially when he began to grind against C-ta.

You never responded, were you afraid, A-ya? There's no need to be. I watch over you because you are helpless. You're helpless even now, aren't you? (CA, character death)

Morishige finds a way to take Mayu with him.