Since I haven't read the 'ladies man novel', I don't know exactly. But it's likely that there is a central male character who is the 'ladies man' himself.
In the 'ladies man novel', there is probably the main male character who is good at charming women. There may also be several female characters who are attracted to him or play important roles in his life, like a childhood friend who has always had feelings for him or a sophisticated woman who challenges his usual ways.