Nappeunnamjaga Dwaera!

Su-Yeon has a weakness for bad boys, a lingering habit from her toxic ex, Hui-Ju. While her current boyfriend, Je-Hyeon, is sweet and gentle, Su-Yeon feels a strange sense of dissatisfaction. When Hui-Ju suddenly reappears as her new team leader, Su-Yeon makes an impulsive wish—and the impossible happens. Overnight, Je-Hyeon 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, Su-Yeon’s life gets complicated.

(Source: WEBTOON)