Omise is a Payment Gateway option mainly focused on the Asian market. It has operation hubs in Japan, Thailand, Singapore and Indonesia. Its setup is quite simple and integrating it with ORnD will allow an easy option to collect payments by debit/credit card.
NOTE: Certain limitations apply to debit cards. More on this can be found here
In order to set up an integration, you will need an Omise account, which you can create here: https://www.omise.co/
Once you have an account, navigate to the "Keys" section. It's located near the bottom of the left menu list under API. Click on it and this will take you to a page where you'll have two keys, one public and one secret. Leave this page for now and go back to the admin portal of OfficeRnD. Navigate to Settings>Integrations and find Omise under Payment Gateways. Click "Add" and this will open a dialog where you can select a location. Omise supports multiple locations, so you can add it multiple times for different locations, or you can just leave it to work for all locations at once. Once added, scroll up and find it on the list of enabled integrations. Click "Configure" and enter the public and secret key that you found earlier in your Omise account. Click "Done" and the integration is ready to use.
Further info on the way Omise works can be found in their support section here