Wen Chang Yu / Male (Tender Huang)

　　A computer forensic expert, intelligent and reacts swiftly to changes. Excels at analyzation and has rich general knowledge. He is a strong character by nature, confident, speaks with sarcasm and has painful memories of a relationship. He is at loggerheads with Kuang Yun Xiang but gradually, falls in love with her. With her support, he walks out of his fear but just then, Yun Xiang’s father objects to their relationship.

　　邝芸香 / 女(刘子绚饰)

　　IQ没昌渝高，但做事很坚持，嫉恶如仇，性格不服输又带点孩子气。缺点是疑心病很重，不容易相信人。初遇昌渝，误会他为了赚钱，不择手段，对昌渝没什么好感。相处一段时间后，芸香开始欣赏昌渝的机智与判断力，渐渐喜欢他。为了帮昌渝克服上一段感情的阴影，费尽了心思，过程中闹出了不少趣事。

　　Kuang Yun Xiang / Female (Jesseca Liu)

　　Has a lower IQ than Wen Chang Yu. A strong-willed character but can be childishly cute at times. She does not trust others easily. When she first meets Wen Chang Yu, she mistakes him for someone who will manipulate just to earn money. Hence, she dislikes him. Gradually, Yun Xiang learns to admire Chang Yu for his resourcefulness and eye for judgement; naturally, falls in love with him. Yun Xiang helps Chang Yu to overcome his fears.

　　张乐天 / 男（陈邦鋆饰）

　　高级督察，芸香的初恋情人、大学的学长。毕业后进入警校，以优异的成绩获奖学金到国外留学，在警界前途无量。对昌渝不按常规的查案方式很有意见，与昌渝是情敌。乐天背后还隐藏了一个不为人知的秘密，为了保住这个秘密，他与昌渝展开一场斗智的角力战。

　　Zhang Le Tian / Male (Andie Chen)

　　A Senior Inspector, Yun Xiang’s first love and a University senior. With an impressive graduation result, he secures a scholarship with the Police Academy and ventures overseas to pursue his studies. He disagrees with Wen Chang’s investigation methods and targets him as a love rival. Le Tian habours a secret and to protect it, he goes into a battle of wits with Wen Chang.

　　邝保民 / 男(刘谦益饰)

　　芸香的爸爸。为人幽默，喜欢讲大道理，妻子早年过世，他独自养大三个孩子。保民自己内心一直隐瞒着一个秘密，连孩子都不知晓。后来为了保密，误打误撞涉入一起网络洗钱案，差点被误会成是犯罪者。

　　Kuang Bao Min / Male (Richard Low)

　　Yun Xiang’s father. A humorous person who loves to talk about life and principles. His wife passed away at a young age, leaving him to bring up their 3 children. Deep down, Bao Min has a secret which even his kids are unaware of. To protect this secret, he got himself embroiled in an Internet fraud and almost had to bear legal punishment for an act he did not commit.