This campaign will only show up on March 7 and 27 (JST, as always) on the occasional 6th quest tab. Thereafter, it will repeat on those specific dates every month. Clearing any mission is fine, and because it's cumulative, previous clears done in the same day are counted in Part 2 and Part 3. Simply spam a low-stamina map e.g. 1-1 or E-1 until hell freezes over 8 times if you don't have enough time.
Moving on to card flip......
For each sheet, SD characters will provide hints as to what is likely inside particular cards, as illustrated below:
If a speech bubble pops up next to the SD character on the left (see reference image above), the card one is pointing at will likely reveal:
- The event girl (on the first small sheet) and a skill upgrade (on the second small sheet)
- Any of the top items on the reward list, which may or may not be one of the event girl's other upgrades (on the rest of the small sheets); same goes with bonus sheets
On the other hand, if Nazuna starts waving, it's likely a Nazuna cake.
It's part of the new updates yesterday (see table in my previous post). The green button (obviously new) takes the player to the refining area to clear character or equipment storage space (depending on which is full) by converting 5-year manyus or idle unleveled equipment.