This announcement was published on April 26, 2023. Pricing, plans, and availability conditions are a record of the information at the time of publication and do not describe the current specifications.
You can set the scope of products that can be ordered together.
If there are products you don't want customers to order together — such as "a pre-order item and a regular item" or "a pre-order item and another pre-order item" — you can restrict them from being added to the cart together, or restrict the transition from the cart page to the checkout page.
You can also display a custom alert message, set by your store, when the button is clicked.
* Available from "Settings" in the left-hand menu of the RuffRuff 予約販売 app.

We've also prepared a support page about restricting simultaneous orders. Please take a look.