If you subscribe to a creator's back number plan, you will be able to view posts that have expired.
※If the creator does not have a back number plan, you cannot subscribe to it.
※If a creator has set an expiration date for a post, all expired posts will be automatically assigned to the back number plan, regardless of the plan.
How to subscribe to the Back Number Plan
You can subscribe to the Back Number Plan by clicking on the "バックナンバープラン" tag on the creator's account page.
Checking Back Number Plan subscription status
You can check the subscription status of your back number plan from the "Plans you have joined" page in "Settings".