From the 1st four eps it feels like Kang Ning - Chai An are the main CP. And with the way things are moving for them I already see them falling in love by ep 10. The first interaction sort of felt like a love at first sight scene to me. ML likes her, he just hasn't accepted it. 5 couples and all is good but if the MC is falling in love in the first 10 eps than it is fast for me.