Here is the full list of all 14 Kuroi Tsubasa achievements.
You have unlocked all CG Images
Not everything in the past was bad, right?
Senpai has had better days
You reunited with your friends
Finished the game
You freed Yamamii from the shadow
You made the right choice, and the girl is happy.
Banana.
The dragon hath been slain
You freed Uehasu from the shadow
You freed Rurika from the shadow
You freed Onizuka from the shadow.
You freed Puka from the shadow.
You have played through the prologue and are ready for action!