Events Come Unexpectedly

It's an event where you collect jigsaw puzzle pieces by fulfilling requests, and the 10th draw guarantees a new piece. I was collecting them mindlessly and finally got the last guaranteed prize ticket! The reward is a ⭐️⭐️⭐️⭐️⭐️ sticker, but often it's not a new sticker that can be added to the sticker book when opened, which is a bummer (Just now, the reward I desperately got from a 30-minute time limit ✕5 stages wasn't a new sticker either ⤵️) I wonder how it will turn out this time, so I decided to leave the prize ticket unopened until the very last moment. If this is a new sticker, I'll complete the sticker book and get the limited edition kitty ﾄﾞｷﾄﾞｷ💓