>>529863389
Anon... They said they were like brothers a few times and Tsukasa is someone Touya looks up to, so that means them being together would be just as awful as incest between to blood related brothers...
There's a certain breed of modern young fujo who think characters saying they having a "like siblings" relationship is just as bad as them being related. Toukasa gets that argument lobbed at them a lot. I'm 99% certain this argument only exists so stupid teenagers can feel morally superior about not shipping two characters together.