Bang Myeong Soo, a renowned webtoon writer, pens a series about his past relationships, detailing encounters with four ex-girlfriends, including an older divorcee, a successful investment firm worker, and a third-rate actress. The webtoon divulges his romantic history and becomes a sensation, transforming Myeong Soo into a mix of a heartthrob and a villain. His work is adapted into a movie. Kim Soo Jin, a film producer desperate to revive her struggling company, unknowingly agrees to adapt Myeong Soo's webtoon. To her shock, Myeong Soo is her ex-boyfriend, and she's one of his exes featured in the story. As filming begins, all of Myeong Soo's former flames reenter his life simultaneously, adding drama to the project. (Source: MyDramaList)