Here is the full list of all 31 Dream Date achievements.
Sensitive idol
Unlocked Yurui's CG
Have all of Yurui
Outdoor hot spring with mixed bath
The idol of hard work
Be strongly kissing
The idol is sick
This soda is all over the place!
dol is the king of the stomach!
Skilled Rina
Unlocked Rina's CG
Have all of Rina
Super size idol
Is Rina on purpose？
Active Rina
Rina is jealous
Reward after cleaning?
Feeding of Rina
What kind of uniform？
Dispel the uneasiness of Kashima
Unlocked Kashima's CG
Have all of Kashima
Win the favor of Kashima
Find the kitten again
It's a real kiss
First touch
Find the kitten
Welcom to Dream World