@harrycuong no, this is a direct sequel, she's a slut, what did you expected? At the end the teacher text her saying that he finally got a job and she is saying that she is going to give him a reward (sex)
@Zaiup it's unclear. The gangbang could be in the past and she simply dreamt about it, since there's no continuity between p24 and p25 (when she receives the msg).