There are two types of ticket sales: first-come, first-served and lottery.
First-Come, First-Served
You can purchase tickets as soon as sales begin, and they will end once the stock runs out.
Lottery
You can apply during the application period, and a lottery will be held after the deadline. Only those who win will be notified, and if payment is made within the deadline, the purchase will be confirmed. No charges will occur for those who do not win.