...is anyone else reading Touri saying those lines to Mahiro in full deadpan?
Because I think he actually gets what is happening, and is just trying to not - I mean, he isn't even getting flustered or ashamed about it, unlike when thinking of Sara, or when he kissed her. And I think it makes sense... after all, without it she can't do her finisher, without a finisher she can't defeat Witch Hunt monsters, and without defeating Witch Hunt monsters they can't gather more info on his sister.
So he just goes along with it while killing his inner self as much as possible while doing so, barely not sounding robotic because that would just make it take longer.