Han Beon Jago Mal Sai

After a huge fight with her boyfriend, “Lee Mok-Ha” goes to a bar to flirt with men, hoping to make him jealous. She ends up heading to a hotel with the bartender, “Lucien.” Only after sending her boyfriend a selfie with Lucien does Mok-Ha realize that he has a girlfriend of his own. Despite this, the two cross the line and end up spending the night together... (Source: Bomtoon, translated)