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