Here is the full list of all 12 Yumeutsutsu Re:After achievements.
Cleared Honoka's ending.
Cleared Banako's ending.
Cleared Kokoro's ending.
Cleared Saki's ending.
Cleared Nana's ending.
Cleared Marie's ending.
Selected every choice in the game.
Viewed every ending.
Selected every choice in Honoka's route.
Selected every choice in Kokoro's route.
Selected every choice in Nana's route.
Selected every choice in Marie's route.