Board Thread:Wiki Discussions/@comment-10733658-20161106155157/@comment-24.205.148.140-20161107170823

You really don't use "ore" in Japan if you're a girl. It's a personal pronoun, so people will take it as how you identify first before seeing as a non-gendered self expression.

Mutsuki didn't flat out call himself a girl, girl was in quotes.

Also, Mutsuki said "It's not that... I think like a man" in a highly doubtful way, in the way a tsundere love interest tells the MC that she hates him, as was said here before.

Also, Mutsuki called himself a "boy murderer" when he looked at the newspaper headline "eldest daughter murders family". He wouldn't be able to say that if he saw himself as a girl then.