Need help

I've been looking for this specific manhwa and the description goes on something like this:
MC is a married woman, with long brunette hair, whose husband is cheating on her. Her friend reccomends her to attend this massage shop where the massage tbey provide is "a special kind." The massage owner/manager is an old colleauge of tge MCs husband, who, back in university, thought the owner/manager couldn't find a stable job. The MC continues to attends the special massages. Many women attends that massage shop. Later on in the story, MC received a special invitation, a VIP ticket or some sort, and when she arrives at the location, she was instructed to only wear her underwear, bra, and an eye mask. In that place are many men and women of the same kind, where they do the deeds. In the meantime, the ownee/manager is in another room, supervising everything through hidden CCTV. The owner/manager wants revenge on someone... I don't really remember...

I just really need to know what happens in the plot （￣へ￣）