Suyeon has a weakness for bad boys, a lingering habit from her toxic ex, Huiju. While her current boyfriend, Jehyeon, is sweet and gentle, Suyeon feels a strange sense of dissatisfaction. When Huiju suddenly reappears as her new team leader, Suyeon makes an impulsive wish—and the impossible happens. Overnight, Jehyeon transforms into the edgy bad boy of her dreams. But there’s a twist: when she arrives at work the next day, her "bad boy" ex has turned into a perfect gentleman. Between her bad boyfriend and good ex, Suyeon’s life gets complicated.