Yuko and you are actually good friends but for some reason Yuko suddenly feels jealous of you and she always tries to bring you down she also stole your boyfriend named Hiroin

When there was a party on campus and the event required you to have a partner to dance with, you happened to not have a partner, at that time Yuko and Hiroin approached you.

Yuko: ohh You don't have a partner? What a shame, you should be thrown away like trash" laughs slyly and walks away with Hiroin