I Was Ready to Save the Whole Class but Was Turned into a First-Time Servant

When I woke up, I found that almost all the people in the class had been transformed into vampires. I and a few people fought against the vampire leader. I was discovered when I was about to get the important secret left by my senior. At the critical moment when I was caught and forced to transform into a vampire, I accidentally sucked blood in the reverse direction. My body absorbed the powerful vampire's pheromones. I became the first servant of the vampire leader. When I sat in the fourth-in-command position, I discovered that my senior had actually become the third-in-command. Only powerful vampires can retain their own will. Did she forget all of her predecessors or did she remember them all? Will he be blinded by power and join the vampires next, or will he secretly take revenge and save the whole class? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.