To withdraw your membership from the game, you can do so directly through the in-game settings.

[How to Withdraw Membership]

Go to the upper right corner menu > Settings > Information tab.
Tap the [Withdraw Membership] button located at the bottom with the <ROM> logo on the right side, and confirm after reading the precautions.
Please note that there is a 24-hour grace period after applying for membership withdrawal. During this time, you can retract your withdrawal request. However, after 24 hours, the withdrawal will be finalized, and account recovery will not be possible. Please proceed with caution.