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