Jeonse is a unique rental system in South Korea where tenants pay a large lump sum deposit instead of monthly rent. This deposit typically ranges from 50% to 80% of the property's value and is returned to the tenant at the end of the lease, usually lasting two years. In this arrangement, landlords invest the deposit in various financial instruments to generate income. Jeonse is popular among South Koreans as it allows them to live in a property without ongoing rent payments, while also providing security for landlords who receive a significant upfront payment.