Qin Jiale looked at this teacher and felt that he was quite nice. Especially his tone when talking with her brother-in-law, which made him likable. She thought having a teacher like this leading would be quite good.
So when the principal asked her, she felt she could follow, because having met him once, he seemed like a decent person, much better than those she hadn't met. Given the circumstances, she naturally chose the side that would benefit her.
"Alright, since the young lady is willing to join your class, then you take her." The principal had no objections after hearing this; it was a choice made by her, so he could only agree to the teacher's request.
