After a drunken night, a woman accidentally ends up in bed with a man she never expected to see again—her ex-boyfriend, who happens to be South Korea's most popular actor. As if that weren't enough, the screenplay she wrote based on their youthful memories is getting adapted into a drama, and the man himself is set to play the male lead! After all, as he puts it, "You wrote us into this story. So naturally, I'm the male lead."