Looking for the name of a movie - I've seen clips from the movie, but I can't remember the name

I still remember some of the plot content

1,The male protagonist and the woman played the SM game and maintained a relationship, and later the male protagonist's girlfriend found out

2,Women know that their relationship with the male protagonist is discovered, and let the male protagonist choose by himself.

3,The woman is flirting with the male protagonist in front of the male protagonist's girlfriend (the memory is blurred, and the plot may be like this)