Here is the full list of all 38 Oblivious Garden ~Carmina Burana achievements.
You made the most tasteful tea.
Get S rank in all kinds of tea.
Collect all the tea recipes.
Collect all tea ingredients.
Get the highest level in tea game.
Make S rank tea for the first time.
Watch the credits.
Read all epilogues.
Leave the fencing hall.
Finish the special chapter.
Make tea that is fit for a princess.
It's you and not the others.
Finally lose the friendship with Rumi.
You go your separate ways.
You finished your job, but this is not the end of the story.
Lin accomplished her dream, and so did you.
Here comes emperor of Celantu.
Something serious may happen if you were not quick enough.
Are there any secrets behind her?
Who is that girl? You will never know.
This is an unexpected ending.
I may, or I may not, who knows?
It is destined that we meet each other again.
A lily would be nice.
The tea you made is not good enough to win the princess.
Do not tell this secret to anyone.
Come across Marian at the fencing hall.
Enjoy Leira's violin playing.
Unfortunately, you didn't finish your job.
You fail to satisfy the princess, dont you?
From now on, you live happily ever after.
The princess and the prince promised to be together forever.
Make D rank tea for the first time.
That is not a documentary fiction, my princess.
All you have to do is to be a good listener.
Some things are better left unsaid.
It is not polite to peep at a lady's diary.
Meet a strange lady in a strange place.