c'mon, author-san, you're better than this... it's not that rape as a plot point is off-limits, but it needs to be handled with care. this feels lazy.
why has kiruko completely lost the badass bodyguard outlook that got them this far? why are they helpless? where's their gun? (and all before they even saw robin!)
I'm ready to be surprised. maybe the next few chapters will reveal this to have been the setup to some huge subversion that will cast all this in a new light. but I wouldn't put money on that.