Every time you defeat a nanpa, or when a nanpa to which you responded to an SOS is defeated, they give out flower tokens and occasionally moonstones. You can use these flowers and moonstone to get items.
You can check the JP wiki to see how many flowers and moonstones you can get from each nanpa. Each amount will vary depending on your participation; the JP wiki has listed the maximum amount you can earn.
1. Flower Exchange: The gacha box for flower tokens.
The flower changes every month. See below for a list.
These flowers expire at the end of each month 23:59 JST, so be sure to spend them before then.
50 flowers per roll
The gacha has a total of 4 boxes, each with a special item that needs to be rolled in order to move on to the next box. The 4th box will reset after the special item is rolled.
The special item for all boxes are love cubes.
Other items in the boxes include kare tickets and cubes.
It's recommended that you finish the entire box before moving on because the prizes are very good and tokens are plentiful.
2. Moonstone Exchange: The exchange area for moonstones.
Moonstones do not expire; however, some of the items you may buy with them do, aka the letters.
Most players are aiming for premium letters (プレミアムミラクルレター).
Flowers
April: Cherry Blossom (Sakura)
May: Carnation
June: Hydrangea
July: Daisy
August: Sunflower
September: Cosmos