Why does most of the material with bisexual tag ends up having a cheating tag. 
Besides that.. I'm on the NYA team hahaha I love this mangaka. 
T_T 
Maybe it's because bisexual comes with the trope "I thought I was het before meeting her/him," and usually has some kind of cheating before the main character comes out to their lover and says, "oh, I realized I love this girl/boy, sorry, let's break up." I don't like it either, to be honest, and I've seen it in both GL and BL stories.