LGBT stuff in Japan is really...odd. Like back in the Sengoku Era, it was perfectly normal for men to have sex with their squires, even calling it Shudo, "the Way of the Boy". For example, Oda Nobunaga and Mori Ranmaru were a notable pair. Which, you know, isn't good.
But then came the Meiji Restoration, and they went totally in the other direction. Now, it's some weird hybrid of a stuff for jokes...but also a market, with yaoi and yuri.