Backstreet Rookie

In the past, Dae-Hyun is a good looking, down-on-his luck man whose girlfriend has just broken up with him while Saet-Byul is a strong, charismatic schoolgirl who is good at fighting.

Yeon-Joo, Dae-Hyun's girlfriend, sees him drinking with Saet-Byul and her friends. The police arrive accusing Dae-Hyun of selling cigarettes to a minor.

Yeon-Joo's jealousy grows as she learns that Saet-Byul, the part timer Dae-Hyun hired, is good looking from a coworker. Angry with rude customers, Saet-Byul gets into a fight with them and is seen by Dal-Shik, Dae-Hyun's best friend.

Dae-Hyun misunderstood the situation between Yeon-Joo and Saet-Byul in the bathroom. Saet-Byul runs into the celebrity, and her old friend, Kang Ji-Wook, who her father used to train.

Though Yeon-Joo is jealous when she witnesses Saet-Byul getting a piggyback ride from Dae-Hyun, she still invites her out to eat with them.

Saet-Byul is attacked in retaliation. Dae-Hyun is close by and rushes to her aid. Despite that, Saet-Byul is fine but needs surgery for her appendicitis.

Saet-Byul tells Dae-Hyun she's quitting. Saet-Byul and Eun-Byul are forced from their apartment after they find out they and several others in the building have been scammed.

Saet-Byul winds up sleeping at the Choi family home for the night, startling Dae-Hyun. She's invited to stay until she finds another place.

Yeon-Joo is annoyed to find out that Saet-Byul is living with and well liked by the Choi family. Yeon-Joo and Dae-Hyun get into a fight.

Dae-Hyun is heartbroken when Yeon-Joo breaks up with him and leaves with Seung-Joon. While the two go out the drink, Dae-Hyun returns to the store for work. Eun-Byul is found out when Saet-Byul witnesses her with her girl group.

Saet-Byul confesses to a sleeping Dae-Hyun that her feelings for him go back longer than the 3 years he remembers.

Dae-Hyun is startled by Ji-Wook's easy confession about his feelings for Saet-Byul. He feels inferior compared to the celebrity Ji-Wook during the filming. He's happy to hear Saet-Byul call him handsome. Saet-Byul and her friends support Eun-Byul's debut. Meanwhile, Geum-Bi and Dal-Shik deal with the falling out from their almost dating. Eun-Byul seeks help from Ji-Wook.