@Vivewe14 It is a light novel(2 in total). If you want to read the web version of it then here is the link: https://jingletranslations.wordpress.com/i-favor-the-villainess/
@Vivewe14 @NotAGay22
https://sevenseasentertainment.com/series/im-in-love-with-the-villainess-light-novel/
It's where the english version is sold. BTW, both already came out(the second one's paper version will come on 2/23)
@tantei_metal I've just gone through my yuri collection and here's all that I've got for yandere yuri:
Futago Wazurai, Hone No Nazuki Made Aisu, A Lady's Table, Suicide Parabellum, Scarlet, and Killing Me.
Is it just me, or does this look like Rei and Claire from I "Favor the Villainess"(also know as I'm in Love with the Villainess because the manga changed the novel's name). Oh, and it's a yuri manga(and webnovel) that I highly recommend.