Do you know what is the question (s) your employer will ask about criminal record on a job application.

a)Do you have a criminal record? ie: convictions
b)Have you ever been charged with a felony?
c)Have you ever been arrested?

If a), does not apply to you. Without conviction, you are presumed innocent. Nothing to confess

Note: don't know Korea but most employers may not consider arrests without convictions or even ask about arrests in most cases. Also, employers usually cannot ask about juvenile criminal records.

For the future, I stronly suggest you have this arrest either sealed or expunged. Any criminal lawyer can answer any question and assist you.

Cheers!

Jack