Red Thread Challenge | Bomtoon Photocard

I actually only planned to get the three hidden cards. But each one costs around NT200, and you basically have to buy them bundled with other regular cards, so you have to spend money for 2 more regular cards (a few sellers only require bundling 1). It'll cost around NT900 or more to get 9 cards. However, this seller was nice and sold a set of 18 cards for NT800. Unfortunately, the original packaging is sold out. Pretty lucky, I just happened to buy the last set.