Da-eun is an ordinary girl who works part-time at a cafe and loves her not-so-special daily life. One day, she delivers coffees to the company which a girl idol group named Angels works for. And her dreamlike one week in her life begins.

Da-eun and Byul switch their lives for a week. Da-eun appears in a dating show with Jung-woo, and Byul works part-time at the cafe, and no one except Da-eun, Byul, and Byul’s manager knows about it. But Ari notices something strange about Byul who works at the cafe

The screenwriter of the show flirts with Da-eun and threatens her, and Jung-woo helps her out of the fix. Ari thinks there’s something fishy about Byul. When a rude customer treats Byul disrespectfully at the cafe, Ji-han helps her.

Da-eun happens to fall asleep in Jung-woo’s hotel room. The next morning, Loony pays a sudden visit to his room. The mission of the day for the show is to make a special dish for Angels, and Loony and Ha-neul join the show. Da-eun happens to hear Jung-woo talk on the phone.

Loony is jealous of Byul who’s doing the dating show with Jung-woo and tries to come between Byul and Jung-woo. Jung-woo is being sweet to Da-eun. Da-eun is about to get caught that she isn’t Byul during shooting.

Today, Da-eun and Jung-woo go on a free date outside. Someone pretends to be Byul’s fan and tries to harm her, which infuriates Jung-woo who notices it. They decide to take a short break and escape the crowds. And they open themselves up to each other.

Da-eun and Jung-woo are given a mission to prepare a guerrilla duet show. The photo of Da-eun and Jung-woo having a kiss is spread on the internet. Byul is worried about Da-eun because of the dreadful stalker of Jung-woo and decides to go to the hotel with Ji-han and Ari.

Jung-woo admits that he and Byul are in a relationship. Byul decides to ask Ji-han out while Da-eun decides to tell Jung-woo that she’s not Byul. However, Ari and the manager appear respectively every time Da-eun is about to tell Jung-woo about the truth.

Both Da-eun and Byul go back to their real lives. Ji-han is waiting for Byul to come to his cafe, and Da-eun misses Jung-woo and even sees him in her dream. Find out if the love of Byul and Da-eun works out well.