Tour Key

I wasn't planning on buying the Tour Key, but I suddenly felt like it and bought it, and now I have 6 gacha tickets with a 1-day expiration 💧 I guess this is something you're supposed to buy on the first day. By the way, half of them turned into the half-pants from the black mask gacha. I don't need four pairs of half-pants. I want the white shirt. Even though they're both N rarity, I don't think I can trade the white shirt for the half-pants, which is depressing 😭