Singers Jeon Yoo-jin and Mai Jin appear as one-day part-timers on MBN's "Welcome to Jjinine." They appear as skilled part-timers helping Park Seo-jin and Jin Hae-sung in the third episode of "Jjinine," which aired on the 3rd. Jeon Yoo-jin and Mai Jin experienced the importance of part-time work by preparing 100 servings in the previous episode. Accordingly, they accepted the request for help from Park Seo-jin and Jin Hae-sung, making the one-day part-time job possible.

Before arriving at "Jjinine," Jeon Yoo-jin and Mai Jin identified the weakness of the "Jjinine Food Truck," which does not sell beverages. They visited a famous beverage spot in Ganghwa-do and received the recipe firsthand. Afterwards, they performed a shake show making misutgaru and omija ade using the methods they learned.

Additionally, they selected "Bendangi Fish and Chips," made with Ganghwa-do specialty bendangi, and the fusion dish "Kimchi Cacio e Pepe Pasta" as menu items. Park Seo-jin was recognized for his wok skills and appointed as the "Pasta Guy," while Jin Hae-sung noticed the semola flour mentioned by Fabri and was selected as the "Fish and Chips Guy." Fabri, equipped with a "K-Patch," encouraged them by shouting "Ppalli Ppalli!" (Hurry up!).

This episode focuses on Park Seo-jin and Jin Hae-sung preparing the first Western course for the "Jjinine Food Truck." Attention is focused on whether they can successfully complete the business. MBN's "Welcome to Jjinine" airs every Monday at 9:10 PM.