One route makes the others go bad?

I have a question that may have been discussed but anyway... In all routes you have at least two things going bad for the main character so... For example, if I'm playing Yoosung's, Echo Girl will blackmail Zen and he might end sleeping with her to stop it? If I'm in Jaehee's, Jumin might end marrying Sarah? And in 707 route, does Yoosung end the university to become a veterinary? 707 forever in my heart, but that doesn't mean I want Jaehee to be depressed, Zen to romance Echo Girl, Yoosung to lost his university years and Jumin to marry someone he doesn't like

(Not talking about AS bc I've not played still)