You need a visa for Bangladesh if you have a South Korean passport
Visa options for Bangladesh (2)
Visa on arrival for a maximum of 30 days for Business and Tourism
Travelers need a visa to visit Bangladesh for Business and Tourism. Travelers can get a visa on arrival in Bangladesh at the port of entry, such as an international airport or border crossing.
This is not offered by sherpa°.
Apply on the government site.
Visitor visa
Travelers need a visa to visit Bangladesh for Business or Tourism. A paper or embassy visa is the only visa available for travelers visiting Bangladesh. The visa is typically a stamp or sticker added to the passport. Travelers must obtain this visa from a local embassy, consulate or visa center before traveling.
This is not offered by sherpa°.
Apply on the government site.