Tonton Streaming Backstreet Rookie (2020) S1E3 - Episode 3

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.