The email address that you received the email is your "between" ID. If you are not using it and want to delete the "Between" ID, then please follow the step below:

1. Sign in with the email address.
2. Disconnect the connection with your partner.  ☞How to disconnect?
3. Once it is disconnected, please delete the account.  ☞Delete account

※Caution

1. If you forgot your password, please reset your password.

☞Reset password

2. Please check the notice before 'Disconnect with partner' or 'Delete the account'.