C308 If you owe something you should pay it back

For some reason, when he saw her smile, Xu Ningzi's heart skipped a beat. Only after a long time did she slowly open the textbook in front of her.

Yet, he didn't hear a single word.

Xu Ningzi was not in a hurry for his results. In any case, there was no one who cared about him. Moreover, he could not bear to see himself being in such a state of mind.

Just as Xu Ningzi was thinking this