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