hello :) Do you know any korean romantic comedy drama where the male lead sort of coaches the female lead on how to date, dress and behave?

2 that immediately jumped to my mind are The Personal Taste and The Birth of a Beauty. 
You kind of have that in Strong Woman Do Bong Soon when the guy teases the girl he likes that she should behave differently if she wants to get her crush's attention.
Oh my Venus, but he is a health/fitness coach instead

there is Japanese High School Debut, where a girl who is not trendy gets coached on how to dress and what to say to boys to find a boyfriend. She ends up falling for her coach