Korean law on How to cancel the contract when the debtor expresses not to perform the contract

1. Facts When A and B signed a contract to lease an officetel, A decided to provide floor heating to B as a special contract.

However, A suggested that heating be done in other ways, such as carpets or electric panels, instead of underfloor heating. B sent a confirmation text to A, saying, "Finally, the floor construction can't be done without carpets and electric panels?"

After sending the text.....