Jeonse is a a payback deposit lease. Lessor is the legal owner of the property. Lessee is the person who rents a property from Lessor. When the agreement is made, Lessor leases a house in exchange for Lessee's payment of key money. And when the lease term expires, Lessor returns the key money deposit and Lessee delivers the possession of the house.
Kalse requires advance payment of the total monthly rent for the entire lease period. Lessor leases a house to Lessee in exchange for Lessee's payment of the lump-sum rent. When the lease contract is expired, the possession is delivered to Lessor but Lessor keeps the lump-sum rent and there is nothing left for Lessee.
Wolse follows the usual monthly rent with key money deposit. Lessor leases a house to Lessee in exchange for Lessee's payment of the deposit & monthly rent. A smaller monthly rent is charged if the deposit is large. At the end of the contract period, the possession is delivered to Lessor, and only the deposit is refundable without any interest.