True but many series like "Hidoku Shinaide" with Nemugasa and Maya is based on this.
On the other hand, hidoku shinaide expands in many chapters the changes of nemugasa and maya's relationship. Here is in next panel. Anyway i always forget manga when the storyline is the same thing over and over.
I'd also like to add that they directly confronted this later. Maya realises he basically raped Nemu and feels regret. Like that's at least something. More than most yaoi will do.
I think Hidoku Shinaide has a consistent storyline tho
Look I'm ok with rape in yaoi but it doesn't make sense when a character rapes and blackmails and then turns out to be a nice person out of the blue