Here is the full list of all 15 Sakura Forest Girls achievements.
Get Maia's Ending
Achieve the Harem Ending
Whatever comes, you can do it together
More than childhoof friends
Get ready for the ritual
Syncing mana levels
The stars contian so many stories
Let the thoughts run over you
Those were not the proper sounds!
Not as light as she looks
She is supposed to be a witch?
Help your clumsy friend
Mika has an offer
No beauty sleep needed
It's just a dream