Directed by Lee Gil-bok, with screenplay by Je In, and produced by Samhwa Networks and United Artists Agency,[2] the series is about falling in love and breaking up between men and women.

Ha Yeong-eun (Song Hye-kyo) is a trendy team leader of design department of a fashion company called 'The One'.

Samhwa Networks has signed an ₩8.96 billion contract with StudioS (Subsidiary-SBS) to produce the drama, (560 million won per episode).

[24] On June 23, 2020, Huayi Brothers announced that Soo Ae has been offered to appear in the drama and she was considering the proposal, but eventually she declined.

[14] On 10 March, the line up of the cast appearing in the drama was confirmed as: Song Hye-kyo, Jang Ki-yong, Choi Hee-seo, Kim Joo-hun, Nam Gi-ae, Choi Hong-il, Joo Jin-mo, Cha Hwa-yeon, Jang Hyuk-jin, Song Yoo-hyun, Lee Joo-myung, Park Hyo-joo, Yoon Na-moo and Yoon Jung-hee.

[37] Samhwa Networks has reported earlier that they've sold the broadcasting rights to Viu parent company PCCW Media in Asian & MENA territories ex-Korea, Japan and China until August 4, 2031.