I might be misrememebring but wasnt there a route where Yuri could blackmail you to support her instead of Kookora? If so, how do I trigger that route? And if I am misremembering then I'm sorry.
Are you talking about Episode 1?
The blackmail route is in my remake, United by Love's Heart. In the original game, what she does is offer you sex in exchange for betraying Kokoro. To trigger that, you just have to agree to help Kokoro with the elections at the start of the chapter. When you reach the second-to-last day, Yuri will intercept you and propose that.