Wang Aizhen laughed helplessly, "From what I know, Little Su confessed to Little Xia last night, but Little Xia apparently rejected her. Originally, no one knew about this incident, but somehow, word got out. Little Su accidentally found out when one of her admirers tried to comfort her this morning, so she got angry because she felt humiliated. But, what does this have to do with you?"
Yu Gangan immediately understood what was happening
She had run into Su Jiushan and Xia Chengzhou last night when she returned to the dormitory.
That must have been when Su Jiushan confessed to Xia Chengzhou and got rejected. That's why his head was down and he refused to look at Su Jiushan, while Su Jiushan looked like she was about to cry.
Su Jiushan must have thought that Yu Gangan witnessed her rejection and told everyone about it.
Thus, feeling like she had been made into a joke, Su Jiushan came looking for Yu Gangan to scold her.