<Notice> I'm going to stop the Gumroad operation for a while. A lot of things have changed, including that Gumroad can no longer use PayPal as a payment/payout method. For now, I have temporarily opened the booth. (acxworld.booth.pm) I haven't decided to move completely, so I'm trying to re-open the Gumroad side as much as possible, but the payment issue hasn't been resolved, so it's going to take more time. Please refer to the announcements from time to time.