The series is a remake of the 2014 film Miss Granny by Hwang Dong-hyuk, it depicts the story of Oh Mal-soon, a 70-year-old grandmother who suddenly turns into 20-year-old Oh Doo-ri.

Developed under the working title Miss Granny, the series is directed by Park Yong-soon, who directed the dramas Secret Mother (2018), Wanted (2016) and Divorce Lawyer in Love (2015), and written by Heo Seung-min, who wrote Risky Romance (2018) and There Is a Blue Bird (2014).

[9] On September 15, BB Entertainment told Newsen that they were positively reviewing regarding Jung Jin-young's appearance.

[11] According to Seoul Economic Daily Star on September 20, Kim Hae-sook had been confirmed to appear.

[12] On July 9, 2024, the production team of the series announced that Jung, who starred in the original film as young rocker Ban Ji-ha, confirmed his appearance but would play in another role.