"The most delicious rice cake is someone else's rice cake." Sung-hyun, who just started working at a kids' cafe, is surprised that she is a mother when she sees "Yu-jin," a young and pretty. There seemed to be no point of contact, but the two met again by chance. Yujin who feels bored in her life as a mother and still wants to be a woman. And I know you're a woman with a wife, but you're falling in love with Yujin. The forbidden love between the two, which is more thrilling because it is unacceptable, begins to burn.