All the Vicious Female Supporting Characters Guide Me

[The system asked me to be a vicious female supporting role, but I failed at it] Dressed as the vicious female supporting character in a campus novel, the system ordered me to frame the female protagonist and obsessed with the male protagonist. I'm going to start right off the bat: I bump into the school bully with a fall, give him a "poisonous lunch", and treat the heroine with yin and yang. Wait for the plot to end, be disgusted by everyone, and then log off to receive the lunch box. But the plot gradually went off the charts—— Pei Yan, the aloof school bully who was being bullied by me, hugged my waist precisely when I was about to fall, and said in a low voice: "Breaked with me? Why don't we do it for real." Shen Qingci, the god of learning, who had eaten the laxative lunch box, emptied the lunch box with a normal expression: "You made it, and I enjoy arsenic as well." Even the original heroine Su Nuan, who I was targeting, put her arm around my shoulders and sneered at the male protagonists: "Ignore these stinky men, my sister will help you get better." Me: "???" System, are you sure we are reading a book? What about the vicious female supporting role that everyone yelled at and beat her up? Why do the protagonists look at me more and more strangely? Also, how come you, the boss of Bai Yueguang who died young in the original work, faked his corpse to join the battlefield?