Unexpected Business (Korean: 어쩌다 사장; Hanja: 어쩌다 社長) is a South Korean reality show program by tvN starring Cha Tae-hyun and Zo In-sung, who unexpectedly become the bosses of a countryside grocery store for 10 days.

[2] The duo take over the reins of a general store in Woncheon-ri, Gangwon-do, which includes a kitchen and small seating space for customers and local residents to dine, rest and socialise.

[3][4] This time, the duo are in charge of a larger supermarket in Gongsan-myeon, South Jeolla-do, selling a wider variety of goods.

[6] In this season, they are in charge of a Korean supermarket in Marina, a port city located in western United States.

[7] Various celebrities visit the store as "part-time workers" (Korean: 알바생) to help Cha Tae-hyun and Zo In-sung, many of whom are friends or former co-stars personally invited by the two main cast.