Hi! You're referring to the beginning of Chapter 2, right? If Kokoro is the class representative, you should be able to ask her to take care of Yuri for you. If Yuri is the class representative, you should be able to refuse on your own and she'll accept it. If you ran a dirty campaign, you can't refuse.
Maybe I'm expressing myself wrong, English is not my native language. In Chapter 1, you can run for class representative election yourself. If you do, you can choose whether to run an honest or dishonest election campaign. And the dishonest one is the dirty one, that's what I mean.
You did well, you should have seen the kiss with Kokoro at the end of the chapter. And now, in the part of the game where you go, when Kokoro tells you that you can't join a club because of Yuri, you should have had the option to ask Kokoro to talk to Yuri for you, thus avoiding her blackmail.
Thank you very much! I'm very glad you like it.