In 2023 the Koreans had a system for dealing with all kinds of things illegal or taxable in Korea but you are NOT bringing them in permanently. I declared restricted items and had a discussion with Korean customs. First she said go through the import process or store them in their impoundment area for a fee until my departure date. I showed them my visa and talked about my situation and after consultation with the boss they let me in with no storage fee and no import paperwork and no tax. I would trust them to store the stuff and for the fee to be reasonable. I was willing to let them store the restricted items but they let me go, they trusted that I would take my stuff when I left. They returned my declaration form so there was no record of me bringing restricted items into the country. The last thing she said to me was "Don't do this again." I don't know what she meant. Did she mean don't bring in more restricted stuff or don't declare it and make her do her job. Maybe she meant both or some other thing.
No one can predict how a particular Korean customs agent will respond in a particular situation but my dealings with the Korean authorities have almost always been reasonable. Their culture is in chaos and the rules change so check the latest regulations- use a computer translator that can process images. For some reason many government websites used photos instead of PDF or plain text.
The worst is when an authority doesn't like to say "No" so he or she makes things difficult until you give up.
No one can predict how a particular Korean customs agent will respond in a particular situation but my dealings with the Korean authorities have almost always been reasonable. Their culture is in chaos and the rules change so check the latest regulations- use a computer translator that can process images. For some reason many government websites used photos instead of PDF or plain text.
The worst is when an authority doesn't like to say "No" so he or she makes things difficult until you give up.