That is because majority of yaoi readers only care for hot yaoi manga characters. Its all about the fantasy. Majority can't take reality. There have been a lot of yaoi out there that have rape but when the story develops into love and characters are hot, its instantly okay. When you make the manga all flowery and put hot guys in them, people instantly fall in love with it even though, rape happens. Of course its still a manga which is not real.
I agree. I think people need to start made different between the Yaoi that they read for story and for sexual purpose, and just dont shun everything just because it doesnt have cute guy, hot sex, or all flowery relationship. I did though. And for rape, i know there is several manga with rape that had a good rating because it was bishie the one who raping another bishie. I only rape like in this one if the story also go hand in hand with the rape thematic of the manga and not just there for sex. I also like story in Yaoi where they bring a lot of commentary about social nature (The main character as gay make it even easier for writer to did it but not all writer unfortunately did this). This manga and Yatamomo last chapter by same writer is one of example. And i also like if the two character meet in unorthodox way like this one (the classmates and childhood with exception one or two had become pretty boring.
I just kinda confuse sometime with the taste of people in this fandom. No offense (its probably just my own opinion alone) but people sometime dub something that has been done thousand time in yaoi genre like childhood friend or classmates, usually with same exact formula of one of them have one sided love at first and then the other start accepting the other feeling as masterpiece but consider series that take theme that rarely explore in depth in yaoi genre as gross just because it touch sensitive subject without trying to understand what writer try to convey first. Its not like every story need to about perfect and healthy relationship of two cute guy you know (that would be really boring in my opinion, lol). Btw that last kiss scene probably one of most memorable scene, i ever see in yaoi and its also fit with the whole feeling of the manga about the reality that society we live in sometimes still try to force you to fit under their standard of normality and discard anybody that dont fit their criteria of normality like Nii-chan.