Mistresses - Contract Relationship

Hi,

I would love to hear about dramas, movies, series, long, short, vertical (anything goes) where the FL is the mistress of the ML (not the SML) or have a contract relationship with him. At the beginning there should be no mutual love between the MC. The FL might be forced due to circumstances (e.g. a sick relative, blackmailed due to revenge, needs money, etc). 

I already created a list with this theme, but would like to add to it:   https://kisskh.at/list/1GNvj9N4

Thanks!