Once you sign up with an email address, you cannot change your ID, you need to re-join with another email account. We’d like to inform you that closing an account means we’ll lose all records of your purchases. You may change your password under [Account > Account Settings].
You may modify the account information under [Member Information > Account Settings > Modify].
Changing of name and date of birth, please contact us at +82 1600-2126 or email us cs@gentlemonster.com and we will help you modify it.