Castle Story "Tome of Knowledge", visit for: Interactive Map, Inventory Cards, Detailed Inventory, and more...
This looks very similar to mine! Yes, the flags will take a while, but with three fire pandas dropping straw every two hours, the grove spawning the panda for the underwear every hour and the fire pandas having a (pretty good) chance to spawn the panda as well, you can make progress pretty quickly provided you can log into the game quite regularly. Even if you can't log in as often, there are still more than 5 full days left in the event, so I think you'll be fine!
To reiterate, Mei has a 7 day timer.
That looks about like mine too. I keep the fountain close to Fire Pandas to stay diligent collecting stones too. Those held me up a bit.
Most of this event was a waiting game, with no extra fountain bought. Now I'm waiting for the last straws and just a few of the leaf underwear with several days left in the event.
So, finally collecting underwear for flags. How small are this (large) pandas undies if it takes 14 for one flag!?
Straw is my limiting factor.
A little off topic but I saw a flash on a special regarding the royal exchange. Does that start today? Did anyone else see that ?