Unexplained hostility

Humans all have something in common when it comes to gossip. After all, it is something that is worth being curious about. What's more, Chen Yuanhao has a crush on Zheng Xiulan, so he wants to know the secret between Craven and Zheng Xiulan even more.
"Well, it's actually nothing. Miss Zheng has been to Tianhai before, and we knew each other there!"
Craven explained simply, "She still owes me a debt. I came here this time just to collect the debt. You don't have to think too much about it....