Here is the full list of all 38 Oblivious Garden ~Carmina Burana achievements.
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.
It is not polite to peep at a lady's diary.
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 S 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.
Meet a strange lady in a strange place.
Are there any secrets behind her?
Something serious may happen if you were not quick enough.
Make D rank tea for the first time.
Collect all the tea recipes.
Get the highest level in tea game.
Collect all tea ingredients.
You made the most tasteful tea.
Get S rank in all kinds of tea.
Unfortunately, you didn't finish your job.
It is destined that we meet each other again.
This is an unexpected ending.
Who is that girl? You will never know.
You go your separate ways.
Lin accomplished her dream, and so did you.
You finished your job, but this is not the end of the story.
Read all epilogues.
Here comes emperor of Celantu.
I may, or I may not, who knows?
Watch the credits.
Finally lose the friendship with Rumi.
It's you and not the others.
Leave the fencing hall.
Make tea that is fit for a princess.
Finish the special chapter.