Here is the full list of all 10 The Future Radio and the Artificial Pigeons achievements.
Start the game for the first time
Start Kaguya's Route
Finish Kaguya's Route
Start Tsubaki's Route
Finish Tsubaki's Route
Start Akina's Route
Finish Akina's Route
Start Mizuki's Route
Finish Mizuki's Route
Unlock all Achievements