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