A love story between an actor and a restaurant proprietress.
To be specific:
A love story between a well-known actor and the proprietress of a wealthy restaurant, which seems to be a make-or-break affair.
The male protagonist has a past relationship, which will be written in a spin-off or another plot, to be determined.
There is no prototype.
If you don't have enough literary skills, you probably won't be able to write long; if you don't have much free time, you probably won't be able to fill in the gaps quickly.
Anyway, take your time~