Plastic surgery definitely isn't the most appropriate translation here. Basically, Jaeil was saying that the mouth guard hasn't been customized/shaped to fit MC's teeth yet, which is something that can easily be done in a few minutes with warm water.
Plastic surgery definitely isn't the most appropriate translation here. Basically, Jaeil was saying that the mouth guard hasn't been customized/shaped to fit MC's teeth yet, which is something that can easily be done in a few minutes with warm water.