Additional Info / My Comments
This series is probably subjective to whether or not it is actually a non-yuri series or not. The story starts with the FMC, Liara, who has a boyfriend, being seduced and falling into being a lesbian by her roommate Stella. But then the story progresses with the male antagonist raping all of the girls, and that becomes the focus of the story. So kind of non-yuri later, but it definitely starts as a yuri NTR story.
There’s also a sequel that takes place in the same world, but has different main characters. Around Ch. 30?, a character named Nina is introduced, and her thing is that she’s a lesbian that loves seducing straight girls. https://novel18.syosetu.com/n3096ft/