Are Yuu and Touko lesbians?

I'm mainly asking because while I know Sayaka is most definitely a lesbian, it's left a bit more ambiguous with Touko and best girl Yuu. At first, I assumed Yuu was just asexual and made an exception for Touko after slowly reciprocating her feelings, and for Touko, I *did* think she was a lesbian too for a while since she even accidentally recommended a steamy lesbian erotica book to Yuu. But then I remember coming across a chapter where they actually discussed the topic of their sexuality. Yuu asked Touko something about if they're both lesbians or something, but Touko said she found labels to be irrelevant or something and her answer was simply "We're us." so I began to assume both are just demisexual. Even Touko turned down lesbian confessions until she fell in love with Yuu. But yeah, as expected with the yuri fandom, they won't accept anything else for their yuri icons to be anything but lesbians.