Idunno, in my eyes it was effective horror.
Kurose was never Shirotani's official psychologist if I remember correctly? He was a random asshole who came around like "Hey I see you have a problem and it kinda turns me on so- UH I MEAN want help? Me profesh"
It was, however, still rape. Your partner is uncomfortable and you still push on forward = rape.
I saw it as a story of two messed up people ending up in each other's lives and what ultimately came of it. I don't really agree with them staying together, but that doesn't mean I think it was a poor writing choice. Because tbh, in many situations like these that does happen.
I think Kurose simply saying straightforward "I only fell for you because of your disorder" is horror enough in and of itself.
I read it as a very psychological story. And that's not really so much a matter of ignorance to the issues at hand. I got fondled by a doctor once, I've been sexually abused when I was a teen and I've been in an emotionally abusive relationship. Maybe I read it as a psychological horror story simply because it spot on depicts the delusions that victims and abusers alike place themselves in when in situations like that and because I recognize it on a personal level.
tbh the weirdest parts about Ten Count imo is every time a dick shows up. Why did they draw them SO WEIRD??