Each chat room's OUR BOX starts with a capacity of 9 messages to save, and on every 100 days of subscription, you get 3 more slots added.
The maximum capacity is 24 messages, including the additional 15 slots.
(For temporarily suspended artists, members who subscribed during the period specified in the announcement will receive the same benefits based on their subscription days.)
The extra slots and stored content enabled by the subscription days' benefits will be retained despite temporary suspension due to the artist's situations or your bubble subscription's termination.