It seems that for some reason Norn doesn't want me to see her naked, so she wears panties and a thin shirt. It's probably puberty. Aisha gets naked at the drop of a hat so I want to have her follow Norn's example.
I take this into account as well and put on pants before washing myself. Still, if I told her that there are guys who get aroused from seeing shirts become transparent from water, what kind of face would she make, I wonder? Though I kind of want to see, I won't say it. It'd be lonely if she stopped bathing with me. It'd be tough if she thought of her Onii-chan as a pervert.