Please refer to the following steps on how to make a purchase.
1. Inside the collection page, tap "Add photo exchange tickets"
2. Tap "Purchase using coins"
3. Decide the number of photo exchange tickets you want to purchase, then tap "Purchase"
4. Confirm the displayed content and tap "Purchase"
5. Your purchase has been completed if it displays, "Photo exchange tickets have been purchased"
*For the purchased photo exchange tickets, please check inside the collection page, "Your current photo exchange tickets"
*Check here for how to purchase coins
*You cannot purchase member rank limited photo exchange tickets