Sogo Doma stuck to his usual line—would a decent girl draw doujinshi, or even... humiliation doujinshi? Sure, he bore some responsibility for Eriri drawing doujinshi, but...
He had only suggested the idea. After that, hadn't he gone to Totsuki for further study? Yet Eriri had kept drawing them!
Utaha Kasumigaoka had no idea how to respond to that. "..."
Who said girls didn't read doujinshi?
In fact, once girls got into that sort of thing, boys had nothing on them.
Although when most girls entered a boy's room, they would sigh, "I thought boys' rooms were all messy—full of doujinshi—but I didn't expect yours to be so clean—there's nothing here. Eh? Could they be under the bed? Ugh, not there either..."
What girls failed to consider was that what boy who dared bring them home wouldn't tidy up beforehand? It wasn't like this was a surprise inspection...
Still, boys shouldn't get too smug. Did they really think girls were dumb and didn't know boys would hide that stuff? No, they knew. But even knowing that, they still had to make that comment—because it was also an indirect way of saying they hadn't read any of that stuff!
Thus, Utaha Kasumigaoka couldn't agree with Sogo Doma at all. What did he mean, a decent girl would never draw doujinshi? Heh, once girls got into that sort of thing, boys had nothing on them.
But could she say something like that? Of course not!
What girl would admit she liked doujinshi?
So when faced with Sogo Doma's claim—"I suspect Eriri is a boy too. Otherwise, there's no way to explain why she likes drawing doujinshi so much. And the reason she became a girl must be because she caught [Puberty Syndrome]. She drew too much doujinshi and started projecting herself into it..."