After leaving the Earl's estate, Mr. Su Bai didn't linger any longer in the city because it was clear that the city was replete with spies of the Vampire Blood, and if that Prince was truly as obsessed with his blood as he believed, then Mr. Su Bai was undeniably the most endangered among all the surviving audience members, as the Prince would definitely deploy people to search for him.
At this point, the only consolation was that he had completed Main Quest 2, although it was indeed done out of luck, Mr. Su Bai had paid a significant price for it.
Unlike Anle and the other audience members who could continue leisurely seeking other opportunities to assassinate Queen Consort, Mr. Su Bai himself had to leave the city immediately, bracing for an imminent pursuit from the vampires.