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