This change first took effect following their return from the Battle God Hall. 

Tang Wulin had already mentally prepared himself for a scathing tirade from Ling Zichen. After all, he had deceived her about their mission.

To his surprise, Ling Zichen left as soon as they returned, citing an urge to return to the Tang Sect to study Eternal Heaven, and she hadn't aimed any criticism against him at all.

Tang Wulin was in disbelief, but he certainly wasn't going to try and change her mind; he was happy that he wouldn't have to deal with her any longer.

After that, he went into seclusion, and following his month-long seclusion, Ling Zichen returned.

Upon meeting her again, Tang Wulin was shocked to discover that she seemed to have transformed into a brand new person.

In the past, she had been cold and overbearing,...