Here is the full list of all 12 Namaiki Dark Elf Sisters achievements.
Spill your seed with your choices more than 5 times.
Think about all the broken hearts.
Dark elves are superior to other elves.
Letting it out inside is the symbol of love.
Paint the walls white with your choices more than 5 times.
The cat is out of the bag.
Let’s establish a new religion.
The first experience turned out to be quite rough.
I'm not done tasting it yet.
My precious white liquid was stolen!
Time is money. Gotta do it quickly.
Hence the story begins.