Here is the full list of all 28 Fantastic Danmaku Festival Part II achievements.
Stay in music room for more than 2 hours
Grazing counts reaching 80,000
Graze counts reaching 40,000
Clear the final boss of extra story without hurts
No moving for 5 seconds when number of danmuku exceeds 800
Clear the final boss of Stage6
Start the final spell card of Stage6 with no more life or bomb and collect the spell card
To start a seal more than 55 times during games
Crash yourself into enemy to clear a spell card(No shooting)
Clear all the stages(1-6 or extra stort) with no bomb
Clear any one stage in normal mode or more without low-speed mode
Grazing counts more then 3,000 in any one non-spell card by Chen in either stage2 or extra story
Scoring exceeds 300,000,000 within single Sakura Seal
Finish extra story with all the characters
Collect the spell card "Domineering Spider Lady" without hurts
Collect the spell card "Seduction‘Wandering Utsusemi’" of Yuyuko without hurts
Finish phantasm story with any character
Finish the normal mode or more with all the characters without continue
Keep hurtless for 60 seconds during Spell "Virginal White Fairy Tale" or Spell "Spotless Dreamland"
Collect the final spell card "Ten Bu Hou Rin" in stage 5 in normal mode or more without using low-speed mode and without hurts
Clear the final boss of stage3 without hurts
No shooting before appearance of mid-way boss in stage2 or the first mid-way boss in extra story
Collect the spell card "Cherry Garden of Saigyoji" of Yuyuko without hurts
Finish extra story with any character
Finish the game without continue
Clear the spell card at final second
The first time start the festival
First time open the game