Dear player,
Sorry for reply you late.About the Gift Box problems,we have submitted it and following the repair proceeding.We will keep you update.Thanks for your feedback .Have a good day!
The gift box issue have been fixed after the week scheduled maintenance(May 4,2015). Please click and use the Gift Box in your inventory.
After using it, you will get a items named Flowers which could be sent to your partner to add 10 serendipity or sent to your friends to increase 1 intimacy.Thanks for your feedback! Enjoy!