Here is the full list of all 31 Dream Date achievements.
Unlocked Kashima's CG
Have all of Kashima
Dispel the uneasiness of Kashima
Win the favor of Kashima
What kind of uniform？
It's a real kiss
Find the kitten again
Find the kitten
First touch
Unlocked Yurui's CG
Have all of Yurui
Sensitive idol
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!
Have all of Rina
Unlocked Rina's CG
Skilled Rina
Super size idol
Active Rina
Rina is jealous
Is Rina on purpose？
Reward after cleaning?
Feeding of Rina
Welcom to Dream World