Here is the full list of all 15 Sakura MMO 2 achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Take a nice bath with Eleri.
Witness Maidie getting... attacked.
Fion isn't interested in discussions.
Relax after a long day of research.
Safe Aislinn from falling.
The meeting of the princess and the guild master.
A loyal knight keeps their word.
Find yourself in an unknown room.
Get to know what happened to the necklace.
Help with the housework.
Fion gets caught... again.
Meet Gardenia - the omniscient entity.
Reach Eleri's ending.
Reach Neve's ending.
Reach Fion's ending.