Here is the full list of all 25 Sakura MMO 3 achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Finally
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Choose Eleri
You may kiss the bride
A familiar feeling
You chose whipped cream over chocolate?
It's been a while
And a new experience
You chose chocolate over whipped cream?
Choose to fight
See her true will
Don't look into it
Meet the goddess iona
Hidden in plain sight
Don't remind her
Reach solid ground again
Find endless knowledge
Combined skills
Mysterious godlike creature
Not solidarity
Capturing Denied
Get to know Bonnie
No mercy in training
Massage to loosen up
Don't slack off