When you give White Magician Pikeru,Dark Magician Girl, Ebon Magician Curran, Card Ejector and Cyber Tutu figurines to the shop owner you will get an additional 10% discount per figurine. After ALL 5 figurines have been given to the shop owner the Picking Flowers pack will become available.
Defeat Akiza 50 times and then partner with her and go to Martha's place. Talk to her and select the second option. The day will end and Akiza will have changed into her Academy costume, her heart will also reset and she will use a different deck type.