I don't know if I'm feeling like this because I might not be remembering this story very well, but I don't recall Kurokawa ever giving signs of being this obsessed about Fujishiro. This chapter felt like a retcon to me, with a Kurokawa that was quite out-of-character.
Oof. Not that it wasnt fucked up before but now we deal with abuse and sexual assault. Author seems to be adressing the problems somewhat which is unusual in manga.