Benefits Attached..? Yejisu

Hwang Yeji is a 25 year old CEO independent but emotionally unstable. The reason? Her boyfriend Hwang Hyunjin who's trapped in a really toxic marriage with a woman. He's been wanting to get a divorce for a year but can he? Bc of his 2 year old daughter it's difficult for him. Yeji is with him for 3 months and he's been telling her that he'll get a divorce really soon and that he will move out of their house. That whole situation tho has been stressing Yeji out so she starts drinking and going to clubs and also hooking up with random girls there as a way to relieve stress. So she's a playgirl. Her best friend is Lee Chaeryeong who's a year younger than her and works in her company as her secretary.
Choi Lia is also 25 and a CEO. Her best friend is Ryujin who's also 25 and works under her company as her secretary. She's emotionally guarded but more caring than she seems.
Yeji and Lia have been rivals since high school. Ryujin and Chaeryeong have been friends with the girls since high school and try to get them to be on good terms but these two? They just can't be on good terms since they're the complete opposite.
But what will happen at their random meeting at the club? Lia who is a way for Yeji to relieve her stress will start to become an exception something different from the other girls she has hooked up with. Eventually they become friends with benefits but will they continue to just be friends with benefits..? They're not supposed to feel anything...Right? But do they? What will happen when the past comes on the surface? Bc what happens in the dark always comes to light...Right?